BIOLOGY CONNECT AN AUSTRALIAN FOCUS 5th Ed BY ROBERT KNOX - Test Bank Instant Download - Complete Test Bank With Answers Sample Questions Are Posted Below Chapter 05 Testbank Student: ___________________________________________________________________________ Cells are able to control the composition of their cytoplasm and internal compartments because cellular membranes A. are selective barriers. B. lack …
$19.99
BIOLOGY CONNECT AN AUSTRALIAN FOCUS 5th Ed BY ROBERT KNOX – Test Bank
Instant Download – Complete Test Bank With Answers
Sample Questions Are Posted Below
Chapter 05 Testbank
Student: ___________________________________________________________________________
A. are selective barriers.
B. lack membrane-spanning proteins.
C. protect the cell interior.
D. are selective barriers and protect the cell interior.
E. allow water to diffuse in and out of the cell.
A. lipid solubility.
B. size.
C. electrical charge.
D. water solubility.
E. All of the answers are correct.
A. an active process.
B. driven by the intrinsic kinetic energy of a molecule.
C. driven by the enzyme activity of membrane proteins.
D. the result of molecules tending to move out unevenly.
E. the movement of molecules from a low- to a high-solute concentration.
A. size of molecule.
B. temperature.
C. type of cell.
D. lipid solubility.
E. magnitude of concentration gradient.
A. The amount of ATP produced by the cell
B. The carbon dioxide concentration gradient
C. The electrochemical gradient across the membrane
D. The osmotic potential
E. The availability of specific carriers
A. The substance can only move from where it is in higher concentration to where it is in lower concentration.
B. Net movement of the substance will continue along the charge gradient when electrochemical equilibrium is reached.
C. The substance will move against its electrical gradient if the opposing concentration gradient is small enough.
D. The substance can move from where it is in higher concentration to where it is in lower concentration if the charge gradient exceeds the opposing concentration gradient.
E. The substance can move along the electrochemical gradient only when the charge difference is very large.
A. strength of the electrical gradient.
B. strength of the concentration gradient.
C. strength of neither gradient.
D. strengths of both gradients.
E. the charge on the ion.
A. can be an active or passive process.
B. can be via transmembrane protein channels or carriers.
C. is usually against electrochemical gradients.
D. is always against the concentration gradient.
E. is generally faster via carrier than channel.
A. size of the solute or molecule that can be transported.
B. size of the proteins involved in their structure.
C. rate of transport.
D. type of cells they are found on.
E. the charge on the molecule being transported.
A. undergo radical conformational change while transporting solutes.
B. unlike channels, span the lipid bilayer.
C. always transport molecules actively.
D. form hydrophilic pores through membranes.
E. are open only when they bind the correct signal molecule.
A. simple diffusion.
B. transmembrane carrier proteins.
C. endocytosis.
D. active transport.
E. transmembrane protein channels.
A. receptors.
B. carriers.
C. channels.
D. desmosomes.
E. pumps.
A. is influenced by the presence of specific signal molecules.
B. is slow compared to transport by protein carriers.
C. requires the presence of ATP.
D. is always independent of the electrical potential difference across the membrane.
E. is non-selective for particular solutes.
A. Ligand-gated channels open in response to mechanical force.
B. Voltage-gated channels open when the charge difference across a membrane decreases.
C. Ligand-gated channels close in response to specific ligands binding.
D. Voltage-gated channels open when the charge inside a cell becomes more negative.
E. Mechanically gated channels are mechanosensitive and open in response to depolarisations.
A. decrease the permeability coefficient of small polar molecules.
B. are more abundant in tissues with low water permeability.
C. maintain water permeability at a constant level.
D. may result in transient changes to the water permeability of tissues.
E. increase the active transport of water out of cells.
A. the hydrolysis of ADP.
B. channel-mediated transport.
C. movement down a concentration gradient.
D. movement against an electrochemical gradient.
E. movement along an electrochemical gradient.
A. carrier with two binding sites that transports two substances in opposite directions.
B. channel with two binding sites that transports two substances in opposite directions.
C. carrier with two binding sites that transports two substances in the same direction.
D. carrier that transports H+ ions to activate a channel.
E. channel with two binding sites that transports two substances in the same direction.
A. removes 2 Na+ for each 3 K+ pumped into the cell.
B. is an antiport system.
C. is an active transport process required to maintain a high intracellular Na+ ion concentration.
D. increases the concentration of Na+ ions in the cell that may interfere with various enzyme systems.
E. uses the energy from one ATP molecule for each Na+–K+ pair transported.
A. passive movement of water against a concentration gradient.
B. passive movement of water through a membrane against its water potential gradient.
C. passive movement of water through a selectively permeable membrane down its water potential gradient.
D. active movement of water against the concentration gradient.
E. active transport of water through a selectively permeable membrane.
A. the same as osmotic pressure.
B. inversely proportional to osmotic pressure.
C. the negative of the osmotic pressure.
D. proportional to the pressure potential.
E. None of the above is correct.
A. The volume increases.
B. The concentration of the water increases.
C. The water molecules cluster together to avoid contacting the solute molecules.
D. There is an effect on the ability of water molecules to diffuse.
E. The free energy of water is decreased.
A. Low concentration of solutes, high hydrostatic pressure
B. High concentration of solutes, high tension
C. Low concentration of solutes, low hydrostatic pressure
D. High concentration of solutes, low tension
E. High concentration of solutes, high hydrostatic pressure
A. swell and possibly burst because of the lower concentration of solutes outside the cell.
B. swell and possibly burst because of the ions diffusing out of the cell.
C. swell and possibly burst because of the greater concentration of solutes outside the cell.
D. shrink because of the lower concentration of solutes outside the cell.
E. shrink because of the greater concentration of solutes outside the cell.
A. shrink away from the cell wall due to the efflux of water.
B. take up water and eventually burst.
C. have no net movement of water into or out of the cell.
D. swell with water inside the cell wall.
E. swell and the cell wall will enlarge to accommodate the cell.
A. the cell membrane will shrink away from the cell wall.
B. the cell will take up water and eventually burst.
C. there will be no net movement of water into or out of the cell.
D. there will be no change in the appearance of the cell.
E. the cell will swell and the cell wall will enlarge to accommodate the cell.
A. the transport of cellular products to the external environment in membrane vesicles.
B. the fusion of vesicles constructed inside the cell to the plasma membrane.
C. the formation of clathrin coated pits for the transport of specific molecules out of the cell.
D. the transport of extracellular products into the cell in membrane vesicles.
E. manufacturing new membrane components and adding them to the plasma membrane.
A. specific receptor proteins on the external surface of the cell membrane.
B. passive transport through the lipid bilayer.
C. clathrin receptors on the external surface of the cell membrane.
D. protein carriers to transport the cholesterol-receptor complex across the membrane.
E. the fusing of clathrin-coated vesicles to the cell membrane.
A. is a receptor in the surface of the cell membrane.
B. is a protein that coats vesicles formed by endocytosis.
C. causes the dissociation of low density lipoprotein-receptor complexes.
D. is a protein that lines the plasma membrane to mark the sites of exocytosis.
E. is a carrier specific for low-density lipoproteins.
A. the transport of cellular products to the external environment in membrane vesicles.
B. the transport of extracellular products into the cell.
C. the formation of clathrin coated pit.
D. binding of a vesicle to a specific protein receptor molecule.
E. the fusion of a vesicle with a lysosome to activate the proteins.
A. Membrane transport proteins accelerate the movement of molecules across membranes.
B. In primary active transport, the energy to transport the molecule is obtained directly from the hydrolysis of metabolic energy.
C. Ion channels are present in all membranes to allow the rapid influx of specific ions.
D. Transport proteins often span the phospholipid bilayer.
E. Aquaporins are a class of transport proteins involved in water transport.
A. get inhibited by similar molecules which compete for the binding site.
B. act like a pore in the membrane to allow ions to flow rapidly along the electrochemical gradient.
C. tend to transport molecules more slowly that transport by channels.
D. require the hydrolysis of metabolic energy for transport.
E. bind a solute to be transported in a hydrophilic pocket causing a conformational change in the protein.
A. Movement is a result of the intrinsic kinetic energy of the molecules.
B. The tendency of the molecules to spread evenly through the space available is termed diffusion.
C. Movement of the molecules is an active process.
D. The larger the concentration difference, the more rapid the rate of movement.
E. Increasing the temperature increases the rate of solute movement.
A. active transport using the energy of ATP.
B. facilitated transport using a carrier protein.
C. diffusion through a ligand-gated channel.
D. active transport using the energy of ATP and facilitated transport using a carrier protein.
E. active transport using the energy of ATP and diffusion through a ligand-gated channel.
A. Ion channels are present on all membranes.
B. Ion channels allow the rapid movement of ions along an electrochemical gradient.
C. Ion channels act like a pipe, opening a hole in the membrane allowing the passage of many different ions through the one channel.
D. Ion channels may be opened or closed by a change in the voltage across a membrane.
E. Ion channels may be opened in response to a physical force change in the membrane.
A. transmembrane transport proteins using ATP to transport water across the membrane.
B. membrane transport proteins which transport water and some specific small ions into cells.
C. specific membrane proteins which are hormonally induced only in kidney cells to transport large volumes of water.
D. a family of membrane-spanning proteins that contribute to water permeability of membranes.
E. All of the answers are correct.
A. the movement of ions down its electrochemical gradient is used to move other solutes against their electrochemical gradient.
B. the hydrolysis of ATP is used to drive hydrogen ions and other ions against the electrochemical gradient.
C. the movement of protons is used to move negatively charged ions against the concentration gradient.
D. the co-transport of ions down the electrochemical gradient.
E.
All the statements are forms of secondary active transport.
A. Rigidity for strength
B. Regulation of internal environment against changes to the external environment
C. Ejection of waste products
D. Facilitates the entry of nutrients
E. Export of products synthesised for transport out of the cell
A. active transport.
B. diffusion.
C. the di-hydrogen monoxide coefficient potential.
D. where water has the highest free energy.
E. kinetic force.
A. Because the dye has higher Brownian motion at higher concentrations
B. Because there is a smaller difference in the concentration gradient
C. Because there is a larger difference in the concentration gradient
D. Because there is a smaller difference in the rate of net diffusion
E. Because there is a larger input of energy facilitated by the more concentrated dye
A. Symport
B. Aquaporin
C. Channel
D. Antiport
E. Cytoporin
A. A change in voltage across the cell membrane
B. A change in the state of a ligand-gated channel
C. All options listed here are correct
D. Rapid entry/exit across the membrane relative to a carrier
E. A change in the state of a mechanically gated channel
A. He will need to genetically engineer it to integrate additional carrier or channel proteins into the cell membranes.
B. He will need to subject it to a natural mutagen such as gamma rays to produce a mutated line with a higher passive transport capacity.
C. He will need to find a new cell line that does not have this nutrient requirement.
D. He must ensure there are adequate levels of the nutrient in his media so that the cell culture can expend energy in the form of ATP and uptake it via active transport.
E. He should add a nutrient binding compound that will chelate with the nutrient, thus facilitating its uptake.
A. Na+, with no associated net change in membrane potential.
B. K+, with no associated net change in membrane potential.
C. Depending on the cells’ homeostatic requirements, it can be either Na+ or K+.
D. Na+, and an associated positive charge.
E.
K+, and an associated positive charge.
The equation Y = Yp + YP represents
B. water potential, pressure potential and osmotic potential respectively.
C. osmotic potential, water potential and pressure potential respectively.
D. pressure potential, water potential and osmotic potential respectively.
E. osmotic potential, pressure potential and water potential respectively.
A. mediated by the membrane folding inwards to form a pit.
B. all of the options listed here are correct.
C. more specifically called receptor-mediated endocytosis.
D. initially stimulated by the binding of a receptor molecule on the membrane.
E. involves the protein clathrin coating the internal surface of the membrane.
Chapter 05 Testbank Key
A. are selective barriers.
B. lack membrane-spanning proteins.
C. protect the cell interior.
D. are selective barriers and protect the cell interior.
E. allow water to diffuse in and out of the cell.
Bloom’s: Knowledge
Difficulty: Easy
Learning Objective: 5.1. Explain why cells must regulate the composition of the cytosol and the membrane-bound compartments and maintain the composition of the cytosol and the membrane-bound compartments within particular limits.
Section: The plasma membrane: the interface between a cell and its environment
A. lipid solubility.
B. size.
C. electrical charge.
D. water solubility.
E. All of the answers are correct.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.1. Explain why cells must regulate the composition of the cytosol and the membrane-bound compartments and maintain the composition of the cytosol and the membrane-bound compartments within particular limits.
Section: The plasma membrane: the interface between a cell and its environment
A. an active process.
B. driven by the intrinsic kinetic energy of a molecule.
C. driven by the enzyme activity of membrane proteins.
D. the result of molecules tending to move out unevenly.
E. the movement of molecules from a low- to a high-solute concentration.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.2. Define, using examples, the terms diffusion, concentration gradient and permeability.
Section: Diffusion
A. size of molecule.
B. temperature.
C. type of cell.
D. lipid solubility.
E. magnitude of concentration gradient.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.2. Define, using examples, the terms diffusion, concentration gradient and permeability.
Section: Diffusion
A. The amount of ATP produced by the cell
B. The carbon dioxide concentration gradient
C. The electrochemical gradient across the membrane
D. The osmotic potential
E. The availability of specific carriers
Bloom’s: Knowledge
Difficulty: Easy
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Diffusion
A. The substance can only move from where it is in higher concentration to where it is in lower concentration.
B. Net movement of the substance will continue along the charge gradient when electrochemical equilibrium is reached.
C. The substance will move against its electrical gradient if the opposing concentration gradient is small enough.
D. The substance can move from where it is in higher concentration to where it is in lower concentration if the charge gradient exceeds the opposing concentration gradient.
E. The substance can move along the electrochemical gradient only when the charge difference is very large.
Bloom’s: Application
Difficulty: Hard
Learning Objective: 5.2. Define, using examples, the terms diffusion, concentration gradient and permeability.
Section: Diffusion
A. strength of the electrical gradient.
B. strength of the concentration gradient.
C. strength of neither gradient.
D. strengths of both gradients.
E. the charge on the ion.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.2. Define, using examples, the terms diffusion, concentration gradient and permeability.
Section: Diffusion
A. can be an active or passive process.
B. can be via transmembrane protein channels or carriers.
C. is usually against electrochemical gradients.
D. is always against the concentration gradient.
E. is generally faster via carrier than channel.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.2. Define, using examples, the terms diffusion, concentration gradient and permeability.
Section: Diffusion
A. size of the solute or molecule that can be transported.
B. size of the proteins involved in their structure.
C. rate of transport.
D. type of cells they are found on.
E. the charge on the molecule being transported.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. undergo radical conformational change while transporting solutes.
B. unlike channels, span the lipid bilayer.
C. always transport molecules actively.
D. form hydrophilic pores through membranes.
E. are open only when they bind the correct signal molecule.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. simple diffusion.
B. transmembrane carrier proteins.
C. endocytosis.
D. active transport.
E. transmembrane protein channels.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. receptors.
B. carriers.
C. channels.
D. desmosomes.
E. pumps.
Bloom’s: Knowledge
Difficulty: Easy
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. is influenced by the presence of specific signal molecules.
B. is slow compared to transport by protein carriers.
C. requires the presence of ATP.
D. is always independent of the electrical potential difference across the membrane.
E. is non-selective for particular solutes.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. Ligand-gated channels open in response to mechanical force.
B. Voltage-gated channels open when the charge difference across a membrane decreases.
C. Ligand-gated channels close in response to specific ligands binding.
D. Voltage-gated channels open when the charge inside a cell becomes more negative.
E. Mechanically gated channels are mechanosensitive and open in response to depolarisations.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. decrease the permeability coefficient of small polar molecules.
B. are more abundant in tissues with low water permeability.
C. maintain water permeability at a constant level.
D. may result in transient changes to the water permeability of tissues.
E. increase the active transport of water out of cells.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. the hydrolysis of ADP.
B. channel-mediated transport.
C. movement down a concentration gradient.
D. movement against an electrochemical gradient.
E. movement along an electrochemical gradient.
Bloom’s: Knowledge
Difficulty: Easy
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. carrier with two binding sites that transports two substances in opposite directions.
B. channel with two binding sites that transports two substances in opposite directions.
C. carrier with two binding sites that transports two substances in the same direction.
D. carrier that transports H+ ions to activate a channel.
E. channel with two binding sites that transports two substances in the same direction.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. removes 2 Na+ for each 3 K+ pumped into the cell.
B. is an antiport system.
C. is an active transport process required to maintain a high intracellular Na+ ion concentration.
D. increases the concentration of Na+ ions in the cell that may interfere with various enzyme systems.
E. uses the energy from one ATP molecule for each Na+–K+ pair transported.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. passive movement of water against a concentration gradient.
B. passive movement of water through a membrane against its water potential gradient.
C. passive movement of water through a selectively permeable membrane down its water potential gradient.
D. active movement of water against the concentration gradient.
E. active transport of water through a selectively permeable membrane.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.7. Define osmosis, osmotic potential and pressure potential.
Section: Osmosis: passive movement of water
A. the same as osmotic pressure.
B. inversely proportional to osmotic pressure.
C. the negative of the osmotic pressure.
D. proportional to the pressure potential.
E. None of the above is correct.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.7. Define osmosis, osmotic potential and pressure potential.
Section: Osmosis: passive movement of water
A. The volume increases.
B. The concentration of the water increases.
C. The water molecules cluster together to avoid contacting the solute molecules.
D. There is an effect on the ability of water molecules to diffuse.
E. The free energy of water is decreased.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.2. Define, using examples, the terms diffusion, concentration gradient and permeability.
Section: The plasma membrane: the interface between a cell and its environment
A. Low concentration of solutes, high hydrostatic pressure
B. High concentration of solutes, high tension
C. Low concentration of solutes, low hydrostatic pressure
D. High concentration of solutes, low tension
E. High concentration of solutes, high hydrostatic pressure
Bloom’s: Application
Difficulty: Medium
Learning Objective: 5.7. Define osmosis, osmotic potential and pressure potential.
Section: Osmosis: passive movement of water
A. swell and possibly burst because of the lower concentration of solutes outside the cell.
B. swell and possibly burst because of the ions diffusing out of the cell.
C. swell and possibly burst because of the greater concentration of solutes outside the cell.
D. shrink because of the lower concentration of solutes outside the cell.
E. shrink because of the greater concentration of solutes outside the cell.
Bloom’s: Application
Difficulty: Hard
Learning Objective: 5.7. Define osmosis, osmotic potential and pressure potential.
Section: Osmosis: passive movement of water
A. shrink away from the cell wall due to the efflux of water.
B. take up water and eventually burst.
C. have no net movement of water into or out of the cell.
D. swell with water inside the cell wall.
E. swell and the cell wall will enlarge to accommodate the cell.
Bloom’s: Application
Difficulty: Hard
Learning Objective: 5.7. Define osmosis, osmotic potential and pressure potential.
Section: Osmosis: passive movement of water
A. the cell membrane will shrink away from the cell wall.
B. the cell will take up water and eventually burst.
C. there will be no net movement of water into or out of the cell.
D. there will be no change in the appearance of the cell.
E. the cell will swell and the cell wall will enlarge to accommodate the cell.
Bloom’s: Knowledge
Difficulty: Hard
Learning Objective: 5.7. Define osmosis, osmotic potential and pressure potential.
Section: Osmosis: passive movement of water
A. the transport of cellular products to the external environment in membrane vesicles.
B. the fusion of vesicles constructed inside the cell to the plasma membrane.
C. the formation of clathrin coated pits for the transport of specific molecules out of the cell.
D. the transport of extracellular products into the cell in membrane vesicles.
E. manufacturing new membrane components and adding them to the plasma membrane.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.8. Explain the process of vesicle-mediated transport and give examples.
Section: Transport of large molecules across membranes
A. specific receptor proteins on the external surface of the cell membrane.
B. passive transport through the lipid bilayer.
C. clathrin receptors on the external surface of the cell membrane.
D. protein carriers to transport the cholesterol-receptor complex across the membrane.
E. the fusing of clathrin-coated vesicles to the cell membrane.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. is a receptor in the surface of the cell membrane.
B. is a protein that coats vesicles formed by endocytosis.
C. causes the dissociation of low density lipoprotein-receptor complexes.
D. is a protein that lines the plasma membrane to mark the sites of exocytosis.
E. is a carrier specific for low-density lipoproteins.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.8. Explain the process of vesicle-mediated transport and give examples.
Section: Transport of large molecules across membranes
A. the transport of cellular products to the external environment in membrane vesicles.
B. the transport of extracellular products into the cell.
C. the formation of clathrin coated pit.
D. binding of a vesicle to a specific protein receptor molecule.
E. the fusion of a vesicle with a lysosome to activate the proteins.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.8. Explain the process of vesicle-mediated transport and give examples.
Section: Transport of large molecules across membranes
A. Membrane transport proteins accelerate the movement of molecules across membranes.
B. In primary active transport, the energy to transport the molecule is obtained directly from the hydrolysis of metabolic energy.
C. Ion channels are present in all membranes to allow the rapid influx of specific ions.
D. Transport proteins often span the phospholipid bilayer.
E. Aquaporins are a class of transport proteins involved in water transport.
Bloom’s: Comprehension
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: The plasma membrane: the interface between a cell and its environment
A. get inhibited by similar molecules which compete for the binding site.
B. act like a pore in the membrane to allow ions to flow rapidly along the electrochemical gradient.
C. tend to transport molecules more slowly that transport by channels.
D. require the hydrolysis of metabolic energy for transport.
E. bind a solute to be transported in a hydrophilic pocket causing a conformational change in the protein.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. Movement is a result of the intrinsic kinetic energy of the molecules.
B. The tendency of the molecules to spread evenly through the space available is termed diffusion.
C. Movement of the molecules is an active process.
D. The larger the concentration difference, the more rapid the rate of movement.
E. Increasing the temperature increases the rate of solute movement.
Bloom’s: Comprehension
Difficulty: Hard
Learning Objective: 5.2. Define, using examples, the terms diffusion, concentration gradient and permeability.
Section: Diffusion
A. active transport using the energy of ATP.
B. facilitated transport using a carrier protein.
C. diffusion through a ligand-gated channel.
D. active transport using the energy of ATP and facilitated transport using a carrier protein.
E. active transport using the energy of ATP and diffusion through a ligand-gated channel.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.5. Define active transport.
Section: Membrane transporters
A. Ion channels are present on all membranes.
B. Ion channels allow the rapid movement of ions along an electrochemical gradient.
C. Ion channels act like a pipe, opening a hole in the membrane allowing the passage of many different ions through the one channel.
D. Ion channels may be opened or closed by a change in the voltage across a membrane.
E. Ion channels may be opened in response to a physical force change in the membrane.
Bloom’s: Comprehension
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. transmembrane transport proteins using ATP to transport water across the membrane.
B. membrane transport proteins which transport water and some specific small ions into cells.
C. specific membrane proteins which are hormonally induced only in kidney cells to transport large volumes of water.
D. a family of membrane-spanning proteins that contribute to water permeability of membranes.
E. All of the answers are correct.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. the movement of ions down its electrochemical gradient is used to move other solutes against their electrochemical gradient.
B. the hydrolysis of ATP is used to drive hydrogen ions and other ions against the electrochemical gradient.
C. the movement of protons is used to move negatively charged ions against the concentration gradient.
D. the co-transport of ions down the electrochemical gradient.
E.
All the statements are forms of secondary active transport.
Bloom’s: Comprehension
Difficulty: Medium
Learning Objective: 5.5. Define active transport.
Section: Membrane transporters
A. Rigidity for strength
B. Regulation of internal environment against changes to the external environment
C. Ejection of waste products
D. Facilitates the entry of nutrients
E. Export of products synthesised for transport out of the cell
Bloom’s: Knowledge
Difficulty: Easy
Learning Objective: 5.1. Explain why cells must regulate the composition of the cytosol and the membrane-bound compartments and maintain the composition of the cytosol and the membrane-bound compartments within particular limits.
Section: Membrane transporters
A. active transport.
B. diffusion.
C. the di-hydrogen monoxide coefficient potential.
D. where water has the highest free energy.
E. kinetic force.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.7. Define osmosis, osmotic potential and pressure potential.
Section: Osmosis: passive movement of water
A. Because the dye has higher Brownian motion at higher concentrations
B. Because there is a smaller difference in the concentration gradient
C. Because there is a larger difference in the concentration gradient
D. Because there is a smaller difference in the rate of net diffusion
E. Because there is a larger input of energy facilitated by the more concentrated dye
Bloom’s: Comprehension
Difficulty: Medium
Learning Objective: 5.2. Define, using examples, the terms diffusion, concentration gradient and permeability.
Section: Diffusion
A. Symport
B. Aquaporin
C. Channel
D. Antiport
E. Cytoporin
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes.
Section: Membrane transporters
A. A change in voltage across the cell membrane
B. A change in the state of a ligand-gated channel
C. All options listed here are correct
D. Rapid entry/exit across the membrane relative to a carrier
E. A change in the state of a mechanically gated channel
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.4. List four general properties of carrier-mediated transport that distinguish it from simple diffusion.
Section: Membrane transporters
A. He will need to genetically engineer it to integrate additional carrier or channel proteins into the cell membranes.
B. He will need to subject it to a natural mutagen such as gamma rays to produce a mutated line with a higher passive transport capacity.
C. He will need to find a new cell line that does not have this nutrient requirement.
D. He must ensure there are adequate levels of the nutrient in his media so that the cell culture can expend energy in the form of ATP and uptake it via active transport.
E. He should add a nutrient binding compound that will chelate with the nutrient, thus facilitating its uptake.
Bloom’s: Evaluation
Difficulty: Hard
Learning Objective: 5.5. Define active transport.
Section: Membrane transporters
A. Na+, with no associated net change in membrane potential.
B. K+, with no associated net change in membrane potential.
C. Depending on the cells’ homeostatic requirements, it can be either Na+ or K+.
D. Na+, and an associated positive charge.
E.
K+, and an associated positive charge.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.6. Describe the action of the Na+-K+ pump in animal cells.
Section: Voltage differences across membranes: a dynamic feature of all cells
The equation Y = Yp + YP represents
B. water potential, pressure potential and osmotic potential respectively.
C. osmotic potential, water potential and pressure potential respectively.
D. pressure potential, water potential and osmotic potential respectively.
E. osmotic potential, pressure potential and water potential respectively.
Bloom’s: Knowledge
Difficulty: Hard
Learning Objective: 5.7. Define osmosis, osmotic potential and pressure potential.
Section: Osmosis: passive movement of water
A. mediated by the membrane folding inwards to form a pit.
B. all of the options listed here are correct.
C. more specifically called receptor-mediated endocytosis.
D. initially stimulated by the binding of a receptor molecule on the membrane.
E. involves the protein clathrin coating the internal surface of the membrane.
Bloom’s: Knowledge
Difficulty: Medium
Learning Objective: 5.8. Explain the process of vesicle-mediated transport and give examples.
Section: Transport of large molecules across membranes
Chapter 05 Testbank Summary
| Category | # of Questions |
| Bloom’s: Application | 4 |
| Bloom’s: Comprehension | 5 |
| Bloom’s: Evaluation | 1 |
| Bloom’s: Knowledge | 35 |
| Difficulty: Easy | 5 |
| Difficulty: Hard | 7 |
| Difficulty: Medium | 33 |
| Learning Objective: 5.1. Explain why cells must regulate the composition of the cytosol and the membrane-bound compartments and maintain the composition of the cytosol and the membrane-bound compartments within particular limits. | 3 |
| Learning Objective: 5.2. Define, using examples, the terms diffusion, concentration gradient and permeability. | 8 |
| Learning Objective: 5.3. Explain how some molecules use intrinsic proteins that span the lipid bilayer to move across membranes. | 17 |
| Learning Objective: 5.4. List four general properties of carrier-mediated transport that distinguish it from simple diffusion. | 1 |
| Learning Objective: 5.5. Define active transport. | 3 |
| Learning Objective: 5.6. Describe the action of the Na+-K+ pump in animal cells. | 1 |
| Learning Objective: 5.7. Define osmosis, osmotic potential and pressure potential. | 8 |
| Learning Objective: 5.8. Explain the process of vesicle-mediated transport and give examples. | 4 |
| Section: Diffusion | 8 |
| Section: Membrane transporters | 20 |
| Section: Osmosis: passive movement of water | 8 |
| Section: The plasma membrane: the interface between a cell and its environment | 4 |
| Section: Transport of large molecules across membranes | 4 |
| Section: Voltage differences across membranes: a dynamic feature of all cells | 1 |
Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
Original price was: $30.00.$20.00Current price is: $20.00.
