AP Bio Test Unit 3 Questions and Answers 100% Pass

AP Bio Test Unit 3 Questions and Answers 100% Pass Synthesis of ATP by the chemiosmotic mechanism occurs during both photosynthesis and respiration. A molecule that is phosphorylated has an increased chemical reactivity; it is primed to do cellular work Approximately how many molecules of ATP are produced from the complete oxidation of two molecules of glucose (C6H12O6 ) in cellular respiration? 76 As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in 1 hour. You find 30,000 molecules of ATP consumed, but only 20,000 molecules of NADPH. Where did the extra ATP molecules come from? cyclic electron flow Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes? the synthesis of ATP CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they fix CO2 into organic acids during the night. Cellular respiration harvests the most chemical energy from which of the following? chemiosmotic phosphorylation During aerobic respiration, electrons travel downhill in which sequence? food → NADH → electron transport chain → oxygen During aerobic respiration, which of the following directly donates electrons to the electron transport chain at the lowest energy level? E) FADH2 During cellular respiration, acetyl CoA accumulates in which location? mitochondrial matrix Each time a molecule of glucose (C6H12O6 ) is completely oxidized via aerobic respiration, how many oxygen molecules (O2 ) are required? 6 Energy released by the electron transport chain is used to pump H+ ions into which location? mitochondrial intermembrane space Figure 10.1 shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Why are they different? D)