BILD1_FA07PS#2

BILD1_FA07PS#2 - A) a B) b C) c D) d E) e Two processes can...

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The sodium-potassium pump in animal cells requires cytoplasmic ATP to pump ions across the plasma membrane. When the proteins of the pump are first synthesized in the rough ER, what side of the ER membrane will the ATP binding site be on? A) It will be on the cytoplasmic side of the ER. B) It will be on the side facing the interior of the ER. C) It could be facing in either direction because the orientation of proteins is scrambled in the Golgi apparatus. D) It doesn't matter, because the pump is not active in the ER. E) Not enough information is provided to answer this question. During a laboratory experiment, you discover that an enzyme-catalyzed reaction has a G of -20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the G for the new reaction? A) -40 kcal/mol B) -20 kcal/mol C) 0 kcal/mol D) +20 kcal/mol E) +40 kcal/mol The following question is based on the figure The G of the REVERSE reaction, (C + D -> A + B) is
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Unformatted text preview: A) a B) b C) c D) d E) e Two processes can be energetically coupled only if A. One hydrolyzes ATP B. Both occur in the plasma membrane C. One of the two reactions does not require enzyme catalysis D. The sum of the G for the two reactions is negative E. They both act to decrease a concentration gradient. The rate of a chemical reaction is increased by A. Increasing the activation energy needed. B. Cooling the reactants. C. Decreasing the concentration of the reactants. D. Increasing the concentration of the products. E. Adding a catalyst. Membrane activities that require energy from ATP hydrolysis include all of the following EXCEPT A. facilitated diffusion. B. active transport. C. Na + ions moving out of the cell. D. proton pumps. E. establishing a proton gradient A chemical reaction that has a positive G is necessarily A. exergonic. B. unidirectional. C. enzyme catalyzed. D. spontaneous. E. None of the above...
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This note was uploaded on 08/05/2009 for the course BILD 1 taught by Professor Boulanger during the Fall '08 term at UCSD.

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BILD1_FA07PS#2 - A) a B) b C) c D) d E) e Two processes can...

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