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Unformatted text preview: y electrons from A) CO2. B) ATP. C) H2O. D) the top of the electron transport chain. E) the bottom of the electron transport chain. 10 Answer: E Topic: 7.8 Skill: Factual Recall 44) The electrons lost from the reaction center of photosystem II are replaced by electrons from A) CO2. B) ATP. C) H2O. D) NADPH. E) photosystem I. Answer: C Topic: 7.8 Skill: Factual Recall 45) Photosystem II A) has P700 at its reaction center. B) is reduced by NADPH. C) passes electrons to photosystem I. D) does not have a reaction center. E) releases CO2 as a by-product. Answer: C Topic: 7.8 Skill: Factual Recall 46) Photophosphorylation differs from oxidative phosphorylation in that A) it involves an electron transport chain. B) energy is stored in the form of a proton concentration difference. C) regeneration of ATP is driven by a flow of protons through an ATP synthase. D) the final electron acceptor is NADP+ and not oxygen. E) its enzymes are membrane-bound. Answer: D Topic: 7.9 Skill: Conceptual Understanding 47) In photophosphorylation, energy from electron flow is used to transport ________ from the ________ to the thylakoid compartment, generating a concentration gradient of ________. A) electrons . . . grana . . . H+
B) H+ . . . grana . . . electrons C) H+ . . . stroma . . . H+
D) electrons . . . stroma . . . H+
E) H+ . . . stroma . . . ATP Answer: C Topic: 7.9 Skill: Factual Recall 11 48) A concentration gradient is a form of A) kinetic energy. B) life. C) an exergonic reaction. D) potential energy. E) entropy. Answer: D Topic: 7.9 Skill: Conceptual Understanding 49) The chloroplast ATP synthase A) is a nucleic acid complex. B) transports H+ ions from the stroma to the thylakoid space. C) couples the flow of H+ to the phosphorylation of NADP+. D) is embedded in the inner membrane of the chloroplast. E) helps transport H+ against the concentration gradient. Answer: B Topic: 7.9 Skill: Factual Recall 50) In photosynthesis, the chemiosmotic production of ATP A) requires oxygen. B) is analogous to the product...
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- Fall '12