EBK BIOLOGY TODAY AND TOMORROW WITHOUT
5th Edition
ISBN: 8220100557187
Author: STARR
Publisher: CENGAGE L
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Chapter 4, Problem 8SQ
Summary Introduction
Introduction: A
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Suggest the mechanism(s) by which each of the following substances is transported across cell membranes: a. CO2 b. Glucose c. C1– d. K+ e. Fat molecules f. α-tocopherol
Movement of glucose down its concentration gradient into cells is facilitated by
Select one:
a.
Active transport
b.
Diffusion across phospholipids
c.
Facilitated transport
d.
a protein that consumes ATP
e.
a protein that gets phosphorylated
Which of the following does not apply to lipid asymmetry?
a.It arises in the endoplasmic reticulum.
b.It arises due to the flip-flop movement of specific phospholipids to the cytosolic monolayer.
c.It is preserved throughout vesicular transport.
d.It depends on the activity of flippase.
Chapter 4 Solutions
EBK BIOLOGY TODAY AND TOMORROW WITHOUT
Ch. 4 - Figure 4.5 Energy inputs and outputs in chemical...Ch. 4 - Figure 4.10 Enzymes, temperature, and pH. Each...Ch. 4 - Prob. 3FIOCh. 4 - Prob. 4FIOCh. 4 - The genus Ferroplasma consists of a few species of...Ch. 4 - Prob. 2DIDCh. 4 - Prob. 3DIDCh. 4 - Prob. 1SQCh. 4 - Prob. 2SQCh. 4 - Prob. 3SQ
Ch. 4 - Prob. 4SQCh. 4 - Prob. 5SQCh. 4 - Prob. 6SQCh. 4 - Prob. 7SQCh. 4 - Prob. 8SQCh. 4 - Ions or molecules tend to diffuse from a region...Ch. 4 - Prob. 10SQCh. 4 - Prob. 11SQCh. 4 - Prob. 12SQCh. 4 - A transport protein requires ATP to pump sodium...Ch. 4 - Prob. 14SQCh. 4 - Prob. 15SQCh. 4 - Prob. 1CTCh. 4 - Water molecules tend to diffuse in response to...Ch. 4 - Dixie Bee wanted to make JELL-O shots for her next...Ch. 4 - The enzyme trypsin is sold as a dietary enzyme...Ch. 4 - Prob. 5CT
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- CO2 can cross the plasma membrane by diffusion. If a cell is in the process of metabolizing glucose, which direction would diffusion tend to carry CO2 molecules? (It may help to consider: where is CO2 highly concentrated? Would diffusion carry CO2 toward or away from this location? Group of answer choices A. From inside the cell to outside the cell B. From outside the cell to inside the cell C. not enough info to tellarrow_forwardMembrane proteins perform the following functions EXCEPT one. Which One? A. form the glycocalyx B. act as receptor proteins C. form pores to allow the passage of small solutes D. behave as enzymes.arrow_forwardWhich of following statements is true? A. Polar molecules cannot simply diffuse across the cell membrane. B. Non-polar molecules cannot simply diffuse across the cell membrane C. Polar molecules cannot enter the extracellular space. D. Non-polar molecules cannot enter the extracellular space.arrow_forward
- Which of the following membrane transport proteins would you expect to be the most selective at conducting substances into the eukaryotic cell cytoplasm (although not the most rapid)? A. the bicarbonate ion channel B. the chloride ion channel C. the fructose carrier protein D. the sodium ion channel E. the potassium ion channelarrow_forwardThe proteins : oxidase ,kinase,lipase, isomerase are all known to function as a. channels b. transporters c.receptors d. enzymes e. none of the abovearrow_forwardFor biological membranes, which of the following statement is NOT true? A. The phospholipid bilayer is a fluid matrix. B. Protein can be anchored to the membrane by covalently linked lipid chains. C. Proteins can move laterally across the membrane. D. For organisms living in cold temperature, their cell membranes contain more triacylglycerols. E. Transverse motion of lipid molecules can occur occasionally. Enzyme lowers when... A. The energy difference between the substrate and the transition state B. The energy difference between the product and the transition state C. Both A and B D. Neither A nor Barrow_forward
- Statements:(1) Fats and oils have the same general chemical structure.(2) Biological waxes have a three-component “block diagram.”(3) In facilitated transport, a substance crosses a cell membrane with the help of a protein “pump.” a. All three statements are true. b. Two of the three statements are true. c. Only one of the statements is true. d. None of the statements is true.arrow_forwardActive transport is different from passive transport because a. no additional energy is required. b. molecules move from low concentration to high concentration. c. ions are involved. d. proteins are involved. e. water is moved across the membrane.arrow_forwardWhich of the following statements is true about active transport? A. The transported species always moves against its electrochemical gradient. B. It is needed only for the transport of polar molecules. C. It is exergonic. D. It must be linked to ATP hydrolysis.arrow_forward
- The correct enzyme involved in synthesizing atp from adp is: a. Kinase b. Protease c. Phosphorylasearrow_forwardWhich of the following could be a function of a membrane protein? Select one: a. Thermal insulation b. Oxygen uptake c. Enzymatic activity d. Energy storagearrow_forwardWhich of these statements about ATP is true?a.The bond joining ADP and the third phosphate is a high-energy bond.b.The formation of ATP is coupled to energy-liberating reactions.c.The conversion of ATP to ADP and Pi provides energy for biosynthesis, cell movement, and other cellular processes that require energy.d.ATP is the “universal energy carrier” of cells.e. .All of these are true.arrow_forward
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