ch 8 q - APBioEnergeticReview _ 1. Why is ATP an important...

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APBioEnergeticReview ____ 1. Why is ATP an important molecule in metabolism? a. Its hydrolysis provides an input of free energy for exergonic reactions. b. It provides energy coupling between exergonic and endergonic reactions. c. Its terminal phosphate group contains a strong covalent bond that when hydrolyzed releases free energy. d. Its terminal phosphate bond has higher energy than the other two. e. A, B, C, and D ____ 2. When ATP releases some energy, it also releases inorganic phosphate. What purpose does this serve (if any) in the cell? a. It is released as an excretory waste. b. It can only be used to regenerate more ATP. c. It can be added to water and excreted as a liquid. d. It can be added to other molecules in order to activate them. e. It can enter the nucleus to affect gene expression. ____ 3. According to the induced fit hypothesis of enzyme catalysis, which of the following is correct ? a. The binding of the substrate depends on the shape of the active site. b. Some enzymes change their structure when activators bind to the enzyme. c. A competitive inhibitor can outcompete the substrate for the active site. d. The binding of the substrate changes the shape of the enzyme's active site. e. The active site creates a microenvironment ideal for the reaction. The following questions are based on the reaction A + B C + D shown in Figure 8.2. Figure 8.2 ____ 4. Which of the following would be the same in an enzyme-catalyzed or noncatalyzed reaction? a. a b. b c. c d. d e. e ____ 5. When electrons move closer to a more electronegative atom, what happens? a. Energy is released. b. Energy is consumed. c. The more electronegative atom is reduced. d. The more electronegative atom is oxidized. e. A and C are correct.
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____ 6. Which of the following statements describes NAD ? a. NAD is reduced to NADH during both glycolysis and the citric acid cycle. b. NAD has more chemical energy than NADH. c. NAD is reduced by the action of hydrogenases. d. NAD can donate electrons for use in oxidative phosphorylation. e. In the absence of NAD , glycolysis can still function. ____ 7. The ATP made during glycolysis is generated by a. substrate-level phosphorylation. b. electron transport. c. photophosphorylation. d. chemiosmosis. e. oxidation of NADH to NAD . ____ 8. The oxygen consumed during cellular respiration is involved directly in which process or event? a. glycolysis b. accepting electrons at the end of the electron transport chain c. the citric acid cycle d. the oxidation of pyruvate to acetyl CoA e. the phosphorylation of ADP to form ATP ____ 9. Why are carbohydrates and fats considered high energy foods? a. They have a lot of oxygen atoms. b. They have no nitrogen in their makeup. c.
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This note was uploaded on 11/29/2010 for the course BUSSINESS 221242 taught by Professor Michaeldouglas during the Spring '10 term at Georgia Perimeter.

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ch 8 q - APBioEnergeticReview _ 1. Why is ATP an important...

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