Life The Science of Biology 9Th ed by david Sadava Test Bank

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Life The Science of Biology 9Th ed by david Sadava Test Bank

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WITH ANSWERS

Life The Science of Biology 9Th ed by david Sadava Test Bank

Test File

to accompany

Life: The Science of Biology, Ninth Edition

Sadava Hillis Heller Berenbaum

 

Chapter 6: Cell Membranes

 

 

TEST FILE QUESTIONS

(By Catherine Ueckert)

 

Multiple Choice

 

  1. The compounds in biological membranes that form a barrier to the movement of hydrophilic materials across the membrane are
  2. integral membrane proteins.
  3. carbohydrates.
  4. lipids.
  5. nucleic acids.
  6. peripheral membrane proteins.

Answer: c

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 106

Blooms Category: 1. Remembering

 

  1. The plasma membrane of animals contains carbohydrates
  2. on the inner side of the membrane, facing the cytosol.
  3. on the outer side of the membrane, protruding into the environment.
  4. on both sides of the membrane.
  5. on neither side of the membrane.
  6. within the membrane.

Answer: b

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 106

Blooms Category: 1. Remembering

 

  1. Biological membranes are composed of
  2. nucleotides and nucleosides.
  3. enzymes, electron acceptors, and electron donors.
  4. fatty acids.
  5. monosaccharides.
  6. lipids, proteins, and carbohydrates.

Answer: e

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 107

Blooms Category: 1. Remembering

 

  1. In biological membranes, the phospholipids are arranged in a _______, with the _______.
  2. bilayer; fatty acids pointing toward each other
  3. bilayer; fatty acids facing outward
  4. single layer; fatty acids facing the interior of the cell
  5. single layer; phosphorus-containing region facing the interior of the cell
  6. bilayer; phosphorus groups in the interior of the membrane

Answer: a

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 107

Blooms Category: 1. Remembering

 

  1. Which of the following statements about the proteins of the plasma membrane and the proteins of the inner mitochondrial membrane is true?
  2. Both membranes have only peripheral proteins.
  3. Only the mitochondrial membrane has integral proteins.
  4. Only the mitochondrial membrane has peripheral proteins.
  5. All of the proteins from both membranes are hydrophilic.
  6. The two membranes differ in their lipid composition.

Answer: e

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 2. Understanding

 

  1. Which of the following statements about cholesterol molecules is true?
  2. They help hold a membrane together.
  3. They transport ions across membranes.
  4. They attach to carbohydrates.
  5. They disrupt membrane function.
  6. They alter the fluidity of the membrane.

Answer: e

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 2. Understanding

 

  1. Which of the following statements about peripheral membrane proteins is true?
  2. They have hydrophobic regions within the lipid portion of the bilayer.
  3. They have hydrophilic regions that protrude in aqueous environments on either side of the membrane.
  4. They move laterally but not vertically within the bilayer.
  5. They control the rate of diffusion.
  6. Their polar regions interact with similar regions of integral membrane proteins.

Answer: e

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 1. Remembering

 

  1. Houseplants adapted to indoor temperatures may die if they are left outdoors, because in a cold environment their
  2. DNA cannot function.
  3. membranes lack adequate fluidity.
  4. photosynthesis is impaired.
  5. chloroplasts malfunction.
  6. membranes need more cholesterol.

Answer: b

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 4. Analyzing

 

  1. A characteristic of plasma membranes that helps them fuse during vesicle formation and phagocytosis is the
  2. ratio of one protein molecule for every 25 phospholipid molecules.
  3. capacity of lipids to associate and maintain a bilayer organization.
  4. constant fatty acid chain length and degree of saturation.
  5. ability of phospholipid molecules to flip over and trade places with other phospholipid molecules.
  6. asymmetrical distribution of membrane proteins.

Answer: b

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 2. Understanding

 

  1. The plasma membranes of winter wheat are able to remain fluid when it is extremely cold by
  2. increasing the number of cholesterol molecules present.
  3. closing protein channels.
  4. decreasing the number of hydrophobic proteins present.
  5. replacing saturated fatty acids with unsaturated fatty acids.
  6. using fatty acids with longer tails.

Answer: d

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 3. Applying

 

  1. Which type of membrane protein would likely be most easily removed in a laboratory experiment?
  2. Integral proteins
  3. Channel proteins
  4. Peripheral proteins
  5. Transmembrane proteins
  6. Gated channels

Answer: c

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 4. Analyzing

 

  1. The LDL receptor is an integral protein that crosses the plasma membrane, with portions of the protein extending both outside and into the interior of the cell. The amino acid side chains (R groups) in the region of the protein that crosses the membrane are most likely
  2. charged.
  3. hydrophilic.
  4. hydrophobic.
  5. carbohydrates.
  6. lipids.

Answer: c

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 4. Analyzing

 

  1. When vesicles from the Golgi apparatus deliver their contents to the exterior of the cell, they add their membranes to the existing plasma membrane. This is made possible by
  2. the capacity of lipids to associate with one another.
  3. the fact that saturated fatty acid chains allow for close packing of fatty acids in the bilayer.
  4. the great affinity cholesterol molecules in the plasma membrane have for fatty acid tails.
  5. the polar proteins affinity for fatty acids.
  6. the noncovalent interactions of the anchored membrane proteins.

Answer: a

Textbook Reference: 6.1: What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 2. Understanding

 

  1. Which of the following is not one of the functional roles of membrane proteins?
  2. Allowing movement of molecules that otherwise would be excluded by the lipid components of the membrane
  3. Transferring signals from outside the cell to inside the cell
  4. Maintaining the shape of the cell
  5. Facilitating the transport of macromolecules across the membrane
  6. Stabilizing the lipid bilayer

Answer: e

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108109

Blooms Category: 2. Understanding

 

  1. A protein that forms an ion channel through a membrane is most likely to be
  2. a peripheral protein.
  3. a transmembrane protein.
  4. a phospholipid.
  5. an enzyme.
  6. entirely outside the phospholipid bilayer.

Answer: b

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 109

Blooms Category: 4. Analyzing

 

  1. The hydrophilic regions of a membrane protein are most likely to be found
  2. only in muscle cell membranes.
  3. associated with the fatty acid region of the lipids.
  4. in the interior of the membrane.
  5. exposed on the surface of the membrane.
  6. either on the surface or inserted into the interior of the membrane.

Answer: d

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 109

Blooms Category: 2. Understanding

 

  1. When a mouse cell and a human cell are fused, the membrane proteins of the two cells become uniformly distributed over the surface of the hybrid cell. This occurs because
  2. many proteins can move around within the bilayer.
  3. all proteins are anchored within the membrane.
  4. proteins are asymmetrically distributed within the membrane.
  5. all proteins in the plasma membrane are peripheral.
  6. different membranes contain different proteins.

Answer: a

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 109

Blooms Category: 4. Analyzing

 

  1. When a membrane is prepared by freeze-fracture and examined under the electron microscope, the exposed interior of the membrane bilayer appears to be covered with bumps. These bumps are
  2. integral membrane proteins.
  3. ice crystals.
  4. platinum.
  5. organelles.
  6. vesicles.

Answer: a

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 109

Blooms Category: 1. Remembering

 

  1. Protein movement within a membrane may be restricted by
  2. glycolipids and glycoproteins.
  3. closure of gated channels.
  4. the cytoskeleton.
  5. cell adhesion.
  6. tight junctions and desmosomes.

Answer: c

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 109

Blooms Category: 2. Understanding

 

  1. Which of the following represents the correct pathway for the synthesis and secretion of insulin, a protein secreted by the cells of the pancreas?
  2. Rough ER, Golgi apparatus, vesicle, plasma membrane
  3. Golgi apparatus, rough ER, lysosome
  4. Lysosome, vesicle, plasma membrane
  5. Plasma membrane, coated vesicle, lysosome
  6. Rough ER, cytoplasm, plasma membrane

Answer: a

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 109

Blooms Category: 2. Understanding

 

  1. Which of the following functions as a recognition signal for interactions between cells?
  2. RNA
  3. Phospholipids
  4. Cholesterol
  5. Fatty acids
  6. Glycolipids

Answer: e

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 110

Blooms Category: 1. Remembering

 

  1. Muscle cells recognize and adhere to one another because of specific membrane proteins called
  2. coated vesicles.
  3. cell adhesion molecules.
  4. glycolipids.
  5. carrier molecules.
  6. transport proteins.

Answer: b

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 111

Blooms Category: 1. Remembering

 

  1. Which of the following are not specialized cell junctions?
  2. Gap junctions
  3. Tight junctions
  4. Desmosomes
  5. Cytoplasmic plaques
  6. Both a and b

Answer: d

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 112113

Blooms Category: 2. Understanding

 

  1. The difference between tight junctions, desmosomes, and gap junctions is that
  2. desmosomes and gap junctions contain keratin, whereas tight junctions have collagen.
  3. gap junctions and tight junctions have specialized protein channels called connexons, whereas desmosomes do not.
  4. tight junctions and desmosomes have mechanical roles, whereas gap junctions facilitate communication between cells.
  5. desmosomes and gap junctions are found in epithelial tissue, whereas tight junctions are found in nerve cells.
  6. they all have different functions, even though their structure is the same.

Answer: c

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 112113

Blooms Category: 2. Understanding

 

  1. A group of transmembrane proteins involved in maintaining cell structure via their interactions with the cytoskeletion are being studied to determine their role in the spread of cancer. These proteins are known as
  2. integrins.
  3. desmosomes.
  4. seal tissues.
  5. connexins.
  6. keratins.

Answer: a

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 113

Blooms Category: 1. Remembering

 

  1. Desmosomes include or associate with
  2. dense, plaquelike regions.
  3. keratin fibers.
  4. external cell adhesion molecules.
  5. Both a and b
  6. All of the above

Answer: e

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 113

Blooms Category: 2. Understanding

 

  1. Structures that contain networks of keratin fibers and provide mechanical stability to epithelial tissues are called
  2. extracellular matrices.
  3. glycoproteins.
  4. gap junctions.
  5. desmosomes.
  6. phospholipid bilayers.

Answer: d

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 113

Blooms Category: 1. Remembering

 

  1. The electric signal for a contraction passes rapidly from one muscle cell to the next by way of
  2. tight junctions.
  3. desmosomes.
  4. gap junctions.
  5. integral membrane proteins.
  6. freeze-fractures.

Answer: c

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 113

Blooms Category: 2. Understanding

 

  1. Specialized channel proteins called connexons occur in
  2. the cytoskeleton.
  3. tight junctions.
  4. desmosomes.
  5. plasmodesmata.
  6. gap junctions.

Answer: e

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 113

Blooms Category: 1. Remembering

 

  1. Which of the following statements about diffusion is false?
  2. Diffusion depends on the intrinsic kinetic energy of molecules.
  3. Diffusion continues until the concentrations are in equilibrium.
  4. In diffusion, molecules move from areas of greater concentration to areas of lesser concentration.
  5. Diffusion is a random process.
  6. Simple diffusion depends upon specific carrier proteins.

Answer: e

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 114

Blooms Category: 4. Analyzing

 

  1. Which of the following does not affect the rate of diffusion of a substance?
  2. Temperature of the solution
  3. Concentration gradient
  4. Distance traveled
  5. Presence of other substances in the solution
  6. Molecular diameter of the diffusing material

Answer: d

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 114

Blooms Category: 2. Understanding

 

  1. Which of the following is an example of passive transport?
  2. Facilitated diffusion
  3. The sodiumpotassium pump
  4. Phagocytosis
  5. Exocytosis
  6. Pinocytosis

Answer: a

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 114

Blooms Category: 3. Applying

 

  1. A concentration gradient of glucose across a membrane means that
  2. there are more moles of glucose on one side of the membrane than on the other.
  3. glucose molecules are more crowded on one side of the membrane than on the other.
  4. there is less water on one side of the membrane than on the other.
  5. the glucose molecules are chemically more tightly bonded on one side than on the other.
  6. there are more glucose molecules within the membrane than outside the membrane.

Answer: b

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 115

Blooms Category: 2. Understanding

 

  1. Which of the following molecules is the most likely to diffuse across a cell membrane?
  2. Glucose
  3. Na+
  4. A steroid
  5. A common amino acid
  6. Cl

Answer: c

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 115

Blooms Category: 2. Understanding

 

  1. The difference between osmosis and diffusion is that
  2. diffusion is passive transport, whereas osmosis is active transport.
  3. only in diffusion do molecules move from areas of high concentrations to areas of low concentration.
  4. only diffusion refers to the movement of materials across a semipermeable membrane.
  5. osmosis refers specifically to the movement of water, whereas diffusion is the movement of molecules.
  6. the process of osmosis varies according to the kinds of particles present.

Answer: d

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 115

Blooms Category: 2. Understanding

 

  1. If a shallow pan is filled with water, a drop of red ink is placed in one end of the pan, and a drop of green ink is placed in the other end, which of the following will be true at equilibrium?
  2. The red ink will be uniformly distributed in one half of the pan, and the green ink will be uniformly distributed in the other half of the pan.
  3. The red and green inks will be uniformly distributed throughout the pan.
  4. Each ink will move down its concentration gradient.
  5. The concentration of each ink will be higher at one end of the pan than at the other end.
  6. No predictions can be made without knowing the molecular weights of the pigment molecules.

Answer: b

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 115

Blooms Category: 2. Understanding

 

  1. Osmosis is a specific form of
  2. diffusion.
  3. facilitated transport.
  4. active transport.
  5. secondary active transport.
  6. movement of water by carrier proteins.

Answer: a

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 115

Blooms Category: 1. Remembering

 

  1. Osmosis moves water from a region of _______ to a region of _______.
  2. high concentration of dissolved material; low concentration of dissolved material
  3. low concentration of dissolved material; high concentration of dissolved material
  4. hypertonic solution; hypotonic solution
  5. negative osmotic potential; positive osmotic potential
  6. low concentration of water; high concentration of water

Answer: b

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 115

Blooms Category: 1. Remembering

 

  1. Osmosis
  2. helps cells maintain turgor pressure in plants.
  3. moves macromolecules from one cell to another.
  4. facilitates the flipping of proteins from one side of the membrane to the other.
  5. keeps concentrations uniform in all cells.
  6. regulates the membrane potential of the cell.

Answer: a

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 115117

Blooms Category: 2. Understanding

 

  1. When placed in water, wilted plants lose their limpness because of
  2. active transport of salts from the water into the plant cells.
  3. active transport of salts into the water from the plant cells.
  4. osmosis of water into the plant cells.
  5. osmosis of water from the plant cells.
  6. diffusion of water from the plant cells.

Answer: c

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 116

Blooms Category: 4. Analyzing

 

  1. When a severely dehydrated patient is brought to the hospital, an IV of normal saline is started immediately. Distilled water is not used because
  2. it would cause water to leave the cells of the patient and the cells would collapse.
  3. nutrients are provided by the saline.
  4. it would cause the patients blood cells to swell and eventually burst.
  5. normal saline is more economical.
  6. the distilled water might be contaminated by bacteria.

Answer: c

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 116

Blooms Category: 3. Applying

 

  1. When placed in a hypertonic solution, animal cells
  2. shrink.
  3. swell.
  4. burst.
  5. transport water out.
  6. concentrate.

Answer: a

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 116

Blooms Category: 2. Understanding

 

  1. If a red blood cell is placed in an isotonic solution, it will
  2. shrivel.
  3. swell and burst.
  4. shrivel and then return to normal.
  5. swell and then return to normal.
  6. take up and release water at an equal rate.

Answer: e

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 116

Blooms Category: 2. Understanding

 

  1. Which of the following statements about channel proteins is true?
  2. They have a central pore of polar amino acids and water.
  3. They are anchored in the hydrophobic bilayer of the plasma membrane.
  4. They are surrounded by nonpolar amino acids.
  5. They are usually gated.
  6. All of the above

Answer: e

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 117

Blooms Category: 2. Understanding

 

  1. One result of the movement of ions through ion channels is the creation of a membrane potential. The membrane potential is
  2. a charge imbalance across the plasma membrane.
  3. the difference in ion concentrations on either side of the plasma membrane.
  4. the difference in ATP concentrations on either side of the plasma membrane.
  5. the capacity for active transport.
  6. the ability of macromolecules to recognize and adhere to one another.

Answer: a

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 117

Blooms Category: 2. Understanding

 

  1. The speed and direction of ions as they move into and out of the cell are determined by the
  2. ability of the ion to let go of its water.
  3. concentration gradient and electrochemical imbalances.
  4. number of channel proteins present.
  5. size and charge of the ion.
  6. presence of specific stimuli to open gated channel proteins.

Answer: b

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 117118

Blooms Category: 2. Understanding

 

  1. How does an ion channel exert its specificity for one ion and not another?
  2. It is a simple matter of charge and ionic size.
  3. The ion channel hydrates ions as they pass through.
  4. The ion channel makes use of aquaporins.
  5. There are recognition sites in the ion channel.
  6. The ion lets go of its water and is attracted to a channel pore protein.

Answer: e

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 118

Blooms Category: 2. Understanding

 

  1. Water crosses the plasma membrane at a rate faster than expected for simple diffusion because of
  2. the hydration of the ions as they pass through.
  3. water channels called aquaporins.
  4. gated channels.
  5. Both a and b
  6. All of the above

Answer: d

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 118

Blooms Category: 2. Understanding

 

  1. In a hypothetical study, cells are placed in a solution of glucose in which the concentration of glucose is gradually increased. At first, the rate at which glucose enters the cells is found to increase as the concentration of the glucose solution is increased. But when the glucose concentration of the solution is increased above 10 M, the rate no longer increases. Which of the following is the likely mechanism for glucose transport into these cells?
  2. Facilitated diffusion via a carrier protein
  3. Facilitated diffusion via a channel protein
  4. Pinocytosis
  5. Secondary active transport
  6. A symporter

Answer: a

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 119

Blooms Category: 5. Evaluating

 

  1. In facilitated diffusion, the diffusion rate of a specific molecule across a membrane does not continue to increase as the concentration difference of the molecule across the membrane increases. This is the case because
  2. facilitated diffusion requires the use of ATP.
  3. as the concentration difference increases, molecules interfere with one another.
  4. the carrier proteins are saturated.
  5. the transport protein must be of the channel type.
  6. the diffusion constant depends on the concentration difference.

Answer: c

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 119

Blooms Category: 2. Understanding

 

  1. Active transport usually moves molecules
  2. in the same direction as diffusion moves them.
  3. in a direction opposite to the one in which diffusion moves them.
  4. in a direction that tends to bring about equilibrium.
  5. toward higher pH.
  6. toward higher osmotic potential.

Answer: b

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 120

Blooms Category: 2. Understanding

 

  1. Plant cells transport sucrose across the vacuole membrane against its concentration gradient by a process known as
  2. simple diffusion.
  3. active transport.
  4. passive transport.
  5. facilitated diffusion.
  6. cellular respiration.

Answer: b

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 120

Blooms Category: 2. Understanding

 

  1. Which of the following is not involved in secondary active transport?
  2. The direct use of ATP
  3. Coupling to another transport system
  4. Use of an existing concentration gradient
  5. The plasma membrane
  6. The ability to concentrate the transported molecule

Answer: a

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 121

Blooms Category: 2. Understanding

 

  1. In the intestine, Na+ and an amino acid bind to the same transport protein that moves the two substances in the same direction. This type of active transport is called
  2. a symporter.
  3. an antiporter.
  4. secondary active transport.
  5. facilitated transport.
  6. a diffusion mechanism.

Answer: a

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 121

Blooms Category: 3. Applying

 

  1. In the parietal cells of the stomach, the uptake of chloride ions is coupled to the transport of bicarbonate ions out of the cell. This type of transport system is called
  2. a uniporter.
  3. a symporter.
  4. an exchange channel.
  5. diffusion.
  6. an antiporter.

Answer: e

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 121

Blooms Category: 3. Applying

 

  1. Amino acids enter cells against their concentration gradients by means of
  2. simple diffusion.
  3. facilitated diffusion.
  4. primary active transport.
  5. secondary active transport.
  6. osmosis.

Answer: d

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 122

Blooms Category: 1. Remembering

 

  1. For each molecule of ATP consumed during active transport of sodium and potassium, there is an import of _______ ion(s) and an export of _______ ion(s).
  2. two Na+; three K+
  3. two Na+; one K+
  4. one K+; three Na+
  5. two K+; three Na+
  6. three K+; two Na+

Answer: d

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 122

Blooms Category: 1. Remembering

 

  1. The only process that can bring glucose molecules into cells that does not involve the metabolic energy of ATP is
  2. phagocytosis.
  3. pinocytosis.
  4. active transport.
  5. diffusion.
  6. osmosis.

Answer: d

Textbook Reference: 6.5 How Do Large Molecules Enter and Leave a Cell?

Page: 123

Blooms Category: 2. Understanding

 

  1. Receptor-mediated endocytosis is the mechanism for transport of
  2. clathrin.
  3. all macromolecules.
  4. ions.
  5. cholesterol.
  6. integral membrane proteins.

Answer: d

Textbook Reference: 6.5 How Do Large Molecules Enter and Leave a Cell?

Page: 123

Blooms Category: 1. Remembering

 

  1. Phagocytosis, pinocytosis, and receptor-mediated endocytosis all involve
  2. the intake of large particles.
  3. invagination of the plasma membrane.
  4. the export of macromolecules.
  5. the presence of receptor proteins.
  6. the intake of fluids by the cell.

Answer: b

Textbook Reference: 6.5 How Do Large Molecules Enter and Leave a Cell?

Page: 123

Blooms Category: 2. Understanding

 

  1. Which of the following processes does not involve the uptake of materials into the cell?
  2. Exocytosis
  3. Pinocytosis
  4. Endocytosis
  5. Receptor-mediated endocytosis
  6. Phagocytsis

Answer: a

Textbook Reference: 6.5 How Do Large Molecules Enter and Leave a Cell?

Page: 123

Blooms Category: 2. Understanding

 

  1. Persons with the inherited disease familial hypercholesterolemia have very high levels of cholesterol because of
  2. hyperactive aquaporins.
  3. the inability to hydrolysize ATP.
  4. deficient LDL receptor proteins.
  5. malformed gap junctions.
  6. defective ion channels.

Answer: c

Textbook Reference: 6.5 How Do Large Molecules Enter and Leave a Cell?

Page: 123124

Blooms Category: 1. Remembering

 

  1. An important function of specialized membranes found in certain organelles is to
  2. help the organelles move.
  3. protect the organelles from increased temperatures.
  4. transform energy.
  5. make use of the cells internal genetic information.
  6. destroy cellular waste products.

Answer: c

Textbook Reference: 6.6 What Are Some Other Functions of Membranes?

Page: 124

Blooms Category: 1. Remembering

 

  1. Which of the following is not a function of plasma membranes?
  2. Conversion of glucose energy to ATP
  3. Arrangement of enzymes
  4. Turning off of a specific cell function
  5. Conduction of nerve impulses
  6. All of the above are functions of plasma membranes.

Answer: e

Textbook Reference: 6.6 What Are Some Other Functions of Membranes?

Page: 124125

Blooms Category: 1. Remembering

 

Fill in the Blank

 

  1. Learning about the formation and operation of plasma membranes may give scientists insights into a disease characterized by plaques and extreme forgetfulness called _______.

Answer: Alzheimers disease

Textbook Reference: 6.0 Membranes and memory

Page: 105106

Blooms Category: 1. Remembering

 

  1. Most of the lipids composing biological membranes are called _______.

Answer: phospholipids

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 106

Blooms Category: 1. Remembering

 

  1. Biological membranes are composed of a continuous phospholipid bilayer in which proteins are embedded. This general design is known as the _______ model.

Answer: fluid mosaic

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 106

Blooms Category: 1. Remembering

 

  1. Lipids can move in a _______ direction, although they seldom move across the bilayers of a biological membrane.

Answer: lateral

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108

Blooms Category: 2. Understanding

 

  1. Membrane segments synthesized on the ER move to other points of the cell in the form of _______.

Answer: vesicles

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 109

Blooms Category: 1. Remembering

 

  1. Membrane proteins covalently bonded to carbohydrates are called _______.

Answer: glycoproteins

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 110

Blooms Category: 1. Remembering

 

  1. Membrane lipids covalently bonded to carbohydrates are called _______.

Answer: glycolipids

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 110

Blooms Category: 1. Remembering

 

  1. Cell adhesion molecules of the same type are called _______.

Answer: homotypic

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 111

Blooms Category: 1. Remembering

 

  1. Cell adhesion molecules that are responsible for the binding together of mammalian egg and sperm cells are referred to as _______.

Answer: heterotypic

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 111

Blooms Category: 1. Remembering

 

  1. The processes of cell recognition and cell adhesion are dependent upon _______ proteins.

Answer: integral

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 111

Blooms Category: 2. Understanding

 

  1. The cells of the intestinal epithelium are linked together in order to prevent substances from passing between them. The type of cell junction linking these cells is called a _______.

Answer: tight junction

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 112

Blooms Category: 1. Remembering

 

  1. The process of random movement of molecules toward a state of equilibrium is called _______.

Answer: diffusion

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 114

Blooms Category: 1. Remembering

 

  1. The ability of some materials to move through biological membranes more readily than through others is called _______.

Answer: selective permeability

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 114

Blooms Category: 1. Remembering

 

  1. Diffusion is the net movement of particles from regions of _______ concentration to regions of _______ concentration.

Answer: greater; lesser

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 114

Blooms Category: 1. Remembering

 

  1. If a cell placed within a solution shrinks, the solution is _______ relative to the cell.

Answer: hypertonic

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 116

Blooms Category: 1. Remembering

 

  1. When plant cells are placed in a hypotonic solution, water enters the cells and exerts pressure against the cell wall. This force is called _______ pressure.

Answer: turgor

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 116

Blooms Category: 1. Remembering

 

  1. The coupled transport system by which glucose and sodium ions simultaneously enter intestinal epithelial cells is called _______.

Answer: symport

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 121

Blooms Category: 1. Remembering

 

  1. The sodiumpotassium pump of cell membranes is an example of a coupled transport called a(n) _______.

Answer: antiporter

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport ?

Page: 121

Blooms Category: 1. Remembering

 

  1. The process of _______ involves coated pits, clathrin, and coated vesicles.

Answer: receptor-mediated endocytosis

Textbook Reference: 6.5 How Do Large Molecules Enter and Leave a Cell?

Page: 123

Blooms Category: 1. Remembering

 

  1. The process by which the plasma membrane engulfs large particles or even whole cells is called _______.

Answer: phagocytosis

Textbook Reference: 6.5 How Do Large Molecules Enter and Leave a Cell?

Page: 123

Blooms Category: 1. Remembering

 

Diagram

 

1.2. The graph below shows the relationship between glucose concentration outside a cell and the rate of glucose diffusion across a cell membrane that has carrier proteins to facilitate diffusion.

 

 

  1. Which of the following represents saturation of the carrier proteins?
  2. A
  3. B
  4. C
  5. D
  6. E

Answer: d

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 119120

Blooms Category: 4. Analyzing

 

  1. According to the graph, as the number of glucose molecules increases, the rate of diffusion
  2. increases indefinitely.
  3. decreases.
  4. increases until a plateau is reached.
  5. can either increase or decrease.
  6. remains the same.

Answer: c

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 119120

Blooms Category: 4. Analyzing

 

 

STUDY GUIDE QUESTIONS

(By Ed Dzialowski)

 

Knowledge and Synthesis

 

  1. Which of the following statements regarding cellular membranes is false?
  2. The hydrophobic nature of the phospholipid tails limits the migration of polar molecules across the membrane.
  3. Integral proteins and phospholipids move fluidly throughout the membrane.
  4. Membrane phospholipids flip back and forth from one side of the bilayer to the other.
  5. Glycolipids and glycoproteins serve as recognition sites on the cell membrane.
  6. All of the above are true.

Answer: c

Feedback: Because of the hydrophobic tails and hydrophilic head of the phospholipids, it is impossible for them to flip back and forth from one side of the membrane bilayer to the other.

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 106110

 

  1. Which of the following contributes to differences in the two sides of the cell membrane?
  2. Differences in peripheral proteins
  3. Different domains expressed on the ends of integral proteins
  4. Differences in phospholipid types
  5. Differences in the carbohydrates attached to membrane proteins
  6. All of the above

Answer: e

Feedback: The cell membrane is asymmetric and has different properties and functions on the cytoplasmic side versus the extracellular side. These properties arise from differences in the constituents of the membrane.

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108109

 

  1. Which of the following cell membrane components serve as recognition signals for interactions between cells?
  2. Cholesterol
  3. Glycolipids or glycoproteins
  4. Phospholipids
  5. Carrier proteins
  6. All of the above

Answer: b

Feedback: Both glycolipids and glycoproteins serve as recognition signals.

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 110

 

  1. Which of the following types of junctions are responsible for communication between cells?
  2. Tight junctions
  3. Desmosomes
  4. Gap junctions
  5. Active transporters
  6. None of the above

Answer: c

Feedback: Gap junctions are involved in chemical and electrical signaling between cells.

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 113

 

  1. You are monitoring the diffusion of a molecule across a membrane. Which of the following will result in the fastest rate of diffusion?
  2. An internal concentration of 5 percent and an external concentration of 60 percent
  3. An internal concentration of 60 percent and an external concentration of 5 percent
  4. An internal concentration of 35 percent and an external concentration of 40 percent
  5. An internal concentration of 50 percent and an external concentration of 50 percent
  6. Both a and b

Answer: e

Feedback: Diffusion may take place in either direction across a membrane and always follows a concentration gradient. The larger the gradient, the faster diffusion will occur.

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 114

 

  1. What will happen if a red blood cell with an internal salt concentration of about 0.85 percent is placed in a saline solution that is 4 percent?
  2. The red blood cell will lose water and shrivel.
  3. The red blood cell will gain water and burst.
  4. The turgor pressure in the cell will increase greatly.
  5. The turgor pressure in the cell will decrease greatly.
  6. The cell will remain unchanged.

Answer: a

Feedback: The cell will lose water as solute concentrations on both sides of the membrane equalize.

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 115

 

  1. In which of the following is solution X hypotonic relative to solution Y?
  2. Solution X has a greater solute concentration than solution Y.
  3. Solution X has a lower solute concentration than solution Y.
  4. Solution X and solution Y have the same solute concentration.
  5. All of the above
  6. None of the above

Answer: b

Feedback: A solution that has a lower solute concentration than another is hypotonic in comparison to the other one.

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 116

 

  1. Which of the following statements regarding osmosis is false?
  2. Osmosis refers to the movement of water along a concentration gradient.
  3. In osmosis, water moves to equalize solute concentrations on either side of the membrane.
  4. The movement of water across a membrane can affect the turgor pressure of some cells.
  5. If osmosis occurs across a membrane, then diffusion is not occurring.
  6. During osmosis water is moving through membrane channels.

Answer: d

Feedback: Diffusion and osmosis are not mutually exclusive and may take place at the same time.

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 115116

 

  1. Channel proteins allow ions that would not normally pass through the cell membrane to pass through via the channel. What property of the channel proteins is responsible for this?
  2. A pore of polar amino acid groups
  3. A pore of hydrophobic amino acid groups
  4. A pore of Ca2+
  5. All of the above
  6. None of the above

Answer: a

Feedback: The charged or polar lining of the channel proteins allows passage of polar and charged molecules.

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 117

 

  1. Which of the following limits the movement of molecules by means of carrier-mediated facilitated diffusion?
  2. The concentration gradient
  3. The availability of carrier molecules
  4. Temperature
  5. Both a and b
  6. All of the above

Answer: d

Feedback: Anything that affects the rate of diffusion will affect carrier-mediated facilitated diffusion. Carrier-mediated facilitated diffusion also relies on the availability of carrier molecules.

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 119

 

  1. Active transport differs from passive transport in that active transport
  2. requires energy.
  3. never requires direct input of ATP.
  4. moves molecules with a concentration gradient.
  5. Both b and c
  6. Both a and c

Answer: a

Feedback: Active transport works against a concentration gradient and requires energy to do so. That energy does not always have to be directly supplied in the form of ATP.

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 120

 

  1. Single-celled animals, such as amoebas, engulf entire cells for food. This manner of eating is called
  2. exocytosis.
  3. endocytosis.
  4. facilitative transport.
  5. active transport.
  6. osmosis.

Answer: b

Feedback: Cells carry out cellular eating by phagocytosis, which is a type of endocytosis.

Textbook Reference: 6.5 How Do Large Molecules Enter and Leave a Cell?

Page: 122

 

  1. Many cells have a sodiumpotassium pump. In order to function, sodiumpotassium pumps require
  2. ATP.
  3. a channel protein.
  4. no concentration gradient.
  5. ADP.
  6. All of the above

Answer: a

Feedback: Sodiumpotassium pumps are forms of primary active transport and require energy in the form of ATP.

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 120

 

  1. Bacterial cells are often found in very hypotonic environments. Which of the following characteristics keeps them from taking in too much water from their environment?
  2. The presence of a cell wall, which allows for a buildup of turgor pressure, preventing additional water from entering the cell
  3. The presence of a cell wall, which allows for a buildup of tonic pressure, preventing additional water from entering the cell
  4. The capacity of the cell to expel water as quickly as it takes it up
  5. The presence of an active water pump
  6. None of the above

Answer: a

Feedback: Turgor pressure limits osmosis, and once a cell is turgid, no more water may be taken on.

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 116

 

  1. The rate of diffusion can be affected by
  2. temperature.
  3. molecule size.
  4. the concentration gradient.
  5. the electrical charge.
  6. All of the above

Answer: d

Feedback: Temperature, molecule size, molecule charge, and concentration gradients all affect the rate at which diffusion takes place.

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 114, 117

 

Application

 

  1. The cells that make up a few animals, such as sponges, can be mechanically separated but then will re-form themselves over time. How are the separated cells able to reorganize themselves?

Answer: The cells in the sponge have the ability to recognize and adhere to other cells from their original body. This cell recognition is tissue-specific (so that the tissues re-form correctly) and species-specific (so that only cells of one species adhere to one another). This ability to adhere and recognize other cells to re-form the sponge is due to specific glycoproteins on the plasma membrane that bind to one another and result in adherence.

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Page: 111

 

  1. Cells have the ability to take in large molecules by endocytosis and secrete them to the environment by exocytosis. Describe each process and explain why both are important for the cell.

Answer: Cells take up large particles, foreign cells, and food sources by endocytosis, in which the plasma membrane of the cell surrounds the particle to form an endocytotic vesicle. Cells secrete substances such as undigested material, digestive enzymes, neurotransmitters, and material for plant wall construction by exocytosis. During exocytosis, the membrane of a secretory vesicle fuses with the plasma membrane and the contents are released to the outside of the cell.

Textbook Reference: 6.5 How Do Large Molecules Enter and Leave a Cell?

Page: 123124

 

  1. A marathon runner has just arrived in the emergency room with severe dehydration, and the physician must decide which type of solution to pump into his veins: pure water, 0.9 percent saline, or 1.5 percent saline. In order to be certain, blood samples are treated with each solution and observed under a microscope. Describe what is likely to happen to the blood cells when exposed to each solution. (Hint: Blood cells are approximately 0.9 percent saline.) Which solution should the physician choose for rehydrating the runner?

Answer: In pure water, the blood cells will take on water through osmosis, swell, and eventually rupture. In 0.9 percent saline, the cells should neither gain nor lose a significant amount of water. In a 1.5 percent saline solution, the cells should lose water and shrivel. In order to rehydrate the runner, a solution isotonic to the patients blood cells, 0.9 percent, should be infused into his bloodstream. A hypotonic solution would end up rupturing the patients cells.

Textbook Reference: 6.3 What Are the Passive Processes of Membrane Transport?

Page: 116

 

  1. Compare and contrast active and passive transport.

Answer: The main difference between active and passive transport is that active transport goes against a concentration gradient and requires energy, whereas passive transport diffuses passively and does not require energy.

Textbook Reference: 6.4 What Are the Active Processes of Membrane Transport?

Page: 120

 

  1. Barrier formation is only one function of the cell membrane. Describe some other functions of the membrane and discuss how the membrane is suited for those functions.

Answer: Membranes function in processing energy transformation and in the organization of chemical reactions. Integral and peripheral proteins contribute to these functions. The membrane serves as a holding site for the catalytic enzymes associated with these processes.

Textbook Reference: 6.6 What Are Some Other Functions of Membranes?

Page: 124125

 

 

TEXTBOOK SELF-QUIZ

 

  1. Which statement about membrane phospholipids is not true?
  2. They associate to form bilayers.
  3. They have hydrophobic tails.
  4. They have hydrophilic heads.
  5. They give the membrane fluidity.
  6. They flip-flop readily from one side of the membrane to the other.

Answer: e

 

  1. When a hormone molecule binds to a specific protein on the plasma membrane, the protein it binds to is called a
  2. ligand.
  3. clathrin.
  4. receptor protein.
  5. hydrophobic protein.
  6. cell adhesion molecule.

Answer: c

 

  1. Which statement about membrane proteins is not true?
  2. They all extend from one side of the membrane to the other.
  3. Some serve as channels for ions to cross the membrane.
  4. Many are free to migrate laterally within the membrane.
  5. Their position in the membrane is determined by their tertiary structure.
  6. Some play roles in photosynthesis.

Answer: a

 

  1. Which statement about membrane carbohydrates is not true?
  2. Some are bound to proteins.
  3. Some are bound to lipids.
  4. They are added to proteins in the Golgi apparatus.
  5. They show little diversity.
  6. They are important in recognition reactions at the cell surface.

Answer: d

 

  1. Which statement about animal cell junctions is not true?
  2. Tight junctions are barriers to the passage of molecules between cells.
  3. Desmosomes allow cells to adhere firmly to one another.
  4. Gap junctions block communication between adjacent cells.
  5. Connexons are made of protein.
  6. The fibers associated with desmosomes are made of protein.

Answer: c

 

  1. You are studying how the protein transferrin enters cells. When you examine cells that have taken up transferrin, you find it inside clathrin-coated vesicles. Therefore, the most likely mechanism for uptake of transferrin is
  2. facilitated diffusion.
  3. an antiporter.
  4. receptor-mediated endocytosis.
  5. gap junctions.
  6. ion channels.

Answer: c

 

  1. Which statement about ion channels is not true?
  2. They form pores in the membrane.
  3. They are proteins.
  4. All ions pass through the same type of channel.
  5. Movement through them is from regions of high concentration to regions of low concentration.
  6. Movement through them is by simple diffusion.

Answer: c

 

  1. Facilitated diffusion and active transport both
  2. require ATP.
  3. require the use of proteins as carriers or channels.
  4. carry solutes in only one direction.
  5. increase without limit as the concentration gradient increases.
  6. depend on the solubility of the solute in lipids.

Answer: b

 

  1. Primary and secondary active transport both
  2. generate ATP.
  3. are based on passive movement of Na+ ions.
  4. include the passive movement of glucose molecules.
  5. use ATP directly.
  6. can move solutes against their concentration gradients.

Answer: e

 

  1. Which statement about osmosis is not true?
  2. It obeys the laws of diffusion.
  3. In animal tissues, water moves into cells if they are hypertonic to their environment.
  4. Red blood cells must be kept in a plasma that is hypotonic to the cells.
  5. Two cells with identical solute concentrations are isotonic to each other.
  6. Solute concentration is the principal factor in osmosis.

Answer: c

 

 

BIOPORTAL DIAGNOSTIC QUIZ (Personalized Study Plan Quiz)

(By Richard McCarty)

 

  1. Phospholipids spontaneously form bilayer structures, but oils form small droplets. Why do oils not form bilayers?
  2. Oils are not as hydrophobic as phospholipids.
  3. The fatty acids in oils preclude bilayer formation.
  4. Oils are energy reserves of cells.
  5. Oils do not have the polar head group that phospholipids have.
  6. Oils and water do not mix.

Answer: d

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 106107

Blooms Category: 4. Analyzing

 

  1. Which of the following statements about membrane proteins is false?
  2. Hydrophilic regions of integral membrane proteins are in contact with the interior of the bilayer.
  3. Peripheral membrane proteins may be associated with the phospholipid head groups.
  4. Integral membrane proteins can move in the plane of the membrane.
  5. Some membrane proteins may have oligosaccharides attached to them.
  6. None of the above

Answer: a

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108109

Blooms Category: 2. Understanding

 

  1. The biochemical reactions of biological membranes are carried out by _______ that may be either in contact with the interior of the bilayer (_______ to the membrane) or arranged on either side of the bilayer (_______ to the membrane).
  2. polysaccharides; intrinsic; exterior
  3. proteins; integral; peripheral
  4. lipids; integral; attached
  5. proteins; peripheral; integral
  6. lipids; integral; peripheral

Answer: b

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 108109

Blooms Category: 2. Understanding

 

  1. A comparison of the properties of the plasma membrane to those of the membrane of lysosomes would reveal that
  2. only the plasma membrane has a lipid bilayer.
  3. the two membranes contain the same proteins.
  4. the two membranes have the same lipids.
  5. all of the proteins in the two membranes are extrinsic to the membrane.
  6. the two membranes have different proteins and lipids.

Answer: e

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 109110

Blooms Category: 2. Understanding

 

  1. In addition to the bilayer lipids and proteins, membranes may contain _______ in the form of _______ and _______.
  2. nucleic acids; DNA; RNA
  3. carbohydrates; cellulose; starch
  4. triglycerides; fats; oils
  5. carbohydrates; glycoproteins; glycolipids
  6. nucleotides; ATP; GTP

Answer: d

Textbook Reference: 6.1 What Is the Structure of a Biological Membrane?

Page: 110

Bloom category 1. Remembering

 

  1. In animals, cell recognition
  2. involves glycolipids.
  3. is mediated by the lipid bilayer.
  4. involves soluble proteins.
  5. involves proteins in plasma membranes.
  6. is usually heterotypic.

Answer: d

Textbook Reference: 6.2 How Is the Plasma Membrane Involved in Cell Adhesion and Recognition?

Pag

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