BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 4, Problem 9MCQ
How does ATP relate to membrane transport?
| a. | The movement of a substance down its concentration gradient through transport proteins requires the hydrolysis of ATP. |
| b. | The higher the concentration of ATP in the cell, the more permeable the membrane is to water and small, nonpolar molecules. |
| c. | Digestion produces a high concentration of ATP outside the cell, and the ATP enters the cell via facilitated diffusion. |
| d. | A cell uses the energy in ATP to transport substances against their concentration gradient. |
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How does ATP relate to membrane transport?a. The movement of a substance down its concentration gradientthrough transport proteins requires the hydrolysis of ATP.b. The higher the concentration of ATP in the cell, the more permeablethe membrane is to water and small, nonpolar molecules.d. A cell uses the energy in ATP to transport substances against theirconcentration gradient.c. Digestion produces a high concentration of ATP outside the cell,and the ATP enters the cell via facilitated diffusion.
If the concentration of a solute is the same both inside and outside the cell, what might you expect with regard to its transport by a membrane protein?
A. Since there is no concentration gradient, no transport either in or out of the cell is possible.
B. The transport protein has been saturated.
C. The solute must be phosphorylated with a phosphate group from ATP before further transport can occur.
D. Movement of the solute across the membrane could occur and cause accumulated on one side of the membrane by an active transport protein.
The concerted model of allosteric regulation is different from the sequential model, because:
A. The concerted model is used to explain homotropic effects
B. The sequential model is used to explain heterotropic effects
C. Both A and B
D. Neither A nor B
Why should it not be surprising that for many cells water requires a protein for its transport across a membrane?
A. There is never a concentration gradient for water across the membrane to drive its transport.
B. The transport protein is needed to prevent the hydrolysis of the phospholipid chains as water crosses the membrane.
C. Water is very polar which inhibits its free diffusion across the membrane.
D. All molecules require transport proteins to cross a membrane.
In the mitochondria phosphate ion (PO43-) and H+ are transported together from the intermembrane space into the matrix. Which statement applies?
A. The interior of the transport protein must be uncharged.
B. The transport protein must have a relatively large central channel to accommodate both ions.
C. The transport protein is a symport.
D. All of the above
Chapter 4 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 4.1 - Describe how your body has potential and kinetic...Ch. 4.1 - Prob. 2MCCh. 4.2 - Prob. 1MCCh. 4.2 - Prob. 2MCCh. 4.2 - Prob. 3MCCh. 4.3 - Prob. 1MCCh. 4.3 - Describe the relationship between energy-requiring...Ch. 4.4 - Prob. 1MCCh. 4.4 - Prob. 2MCCh. 4.4 - What is the role of negative feedback in enzyme...
Ch. 4.4 - Prob. 4MCCh. 4.5 - Prob. 1MCCh. 4.5 - What types of substances diffuse freely across a...Ch. 4.5 - What would happen to a plant cell in a hypertonic...Ch. 4.5 - Prob. 4MCCh. 4.5 - Prob. 5MCCh. 4.5 - Prob. 6MCCh. 4 - Prob. 1MCQCh. 4 - How does ATP participate in coupled reactions? a....Ch. 4 - How do proteins contribute to the function of an...Ch. 4 - Prob. 4MCQCh. 4 - Prob. 5MCQCh. 4 - Prob. 6MCQCh. 4 - Prob. 7MCQCh. 4 - Prob. 8MCQCh. 4 - How does ATP relate to membrane transport? a. The...Ch. 4 - Prob. 1WIOCh. 4 - Prob. 2WIOCh. 4 - Prob. 3WIOCh. 4 - Prob. 4WIOCh. 4 - Use what you know about enzymes to propose an...Ch. 4 - Considering that enzymes are essential to all...Ch. 4 - Prob. 7WIOCh. 4 - Prob. 8WIOCh. 4 - Prob. 9WIOCh. 4 - List three ways the content in this chapter...Ch. 4 - Golden knifefish use an electric field to detect...Ch. 4 - Review Burning Question 4.4, which explains how...Ch. 4 - Prob. 1PITCh. 4 - Prob. 2PITCh. 4 - Prob. 3PITCh. 4 - Prob. 4PIT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- How do small fat-soluble molecules normally get into a cell? a. they never get in b. the pass through specialized proteins in the cell membrane called aquaporins c. they bind to protein carriers d. they pass through membrane protein channels e. They dissolve in the hydrophobic components of the membrane and enter the cell by diffusionarrow_forwardWhich observation would suggest that active transport, rather than passive diffusion, is responsible for moving a particular substance from the outside of a cell into a cell? a. a higher concentration of the substance outside the cell than inside the cell. b. a higher concentration of the substance inside the cell than outside the cell. c. a positive correlation between ATP breakdown and the amount of substance taken in. d. b and c are both correct.arrow_forwardWhere will the energy for active transport be derived from? A. Hydrolysis of ATP B. Co-transport of metabolites via carrier molecules, channels or gates C. Amino acid rearrangement due to conformational changes in the protein carriers, channels or gates. D. Both A and B E. All of thesearrow_forward
- Which is the complete description of active transport? The movement of molecules from an area of higher concentration to an area of lower A concentration across a selectively permeable membrane which uses metabolic energy from ATP. The movement of molecules from an area of higher concentration to an area of lower B concentration across a selectively permeable membrane which does not use metabolic energy from ATP. The movement of molecules from an area of lower concentration to an area of higher C concentration across a selectively permeable membrane which uses metabolic energy from ATP and transport proteins. The movement of molecules from an area of lower concentration to an area of higher D concentration across a selectively permeable membrane which does not use metabolic energy from ATP and transport proteins.arrow_forwardHow can substances be transported across a membrane against their concentration gradient? A. If the plasma membrane is fully hydrophobic. B. The plasma membrane is permeable to all small molecules. C. Some membrane proteins act as channels for specific molecules to enter the cell. D. Some membrane proteins are ATP-dependent carrier molecules.arrow_forwardExplain the process and give an example of each form of cellular transport. a. Passive Diffusion b. Active Transport c. Facilitated Diffusionarrow_forward
- Which is incorrect?a. Diffusion of a solute through a membrane is considerably quicker thandiffusion of the same solute through a water layer of equal thickness.b. A single ion, such as K1, can diffuse through more than one type ofchannel.c. Lipid-soluble solutes diffuse more readily through the phospholipidbilayer of a plasma membrane than do water-soluble ones.d. The rate of facilitated diffusion of a solute is limited by the number of transporters in the membrane at any given time.e. A common example of cotransport is that of an ion and an organic molecule.arrow_forwardWhich of these statements about the facilitated diffusion of glucose is true? a. There is a net movement from the region of lower to the region of higher concentration. b.Carrier proteins in the plasma membrane are required for this transport. c. This transport requires energy obtained from ATP. d.It is an example of cotransport.arrow_forwardWhich process does not require cellular energy (and thus, it is a passive process)? a. primary active transport. b. carrier-mediated facilitated diffusion. c. endocytosis. d. exocytosis.arrow_forward
- Which statement is NOT true of membrane transport • proteins? A. Their specificity depends on their three-dimensional structure. B. They are responsible in some cases for facilitated diffusion. C. They are responsible in some cases for active transport. D. They produce a chemical change in the molecules they are transporting.arrow_forwardWhat is exocytosis? A. The process by which a cell engulfs a large particle or another cell, eating it B. The process by which a cell expels the contents of an internal vesicle to the extracellular fluid C. The process by which a cell takes in a small amount of extracellular fluid and its contents by the ballooning inward of the plasma membrane D. Pressure that a fluid exerts against a structure that contains itarrow_forwardWhy can't ions like sodium (Na+) or potassium (K+) diffuse directly through the phospholipid bilayer? A. Ions can only use active transport to move through the membrane B. Ions are hydrophobic and are repelled by the polar membrane C. Ions are polar and are repelled by the nonpolar part of the membrane D. Ions need to become stable before entering the cellarrow_forward
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