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Unformatted text preview: n acceptor E) absorption of photons by carotenoids Answer: A Topic: 7.7 Skill: Conceptual Understanding 37) How do the reaction centers of photosystem I and II differ? A) Chlorophyll a is found in photosystem I and chlorophyll b in photosystem II. B) Each preferentially absorbs slightly different wavelengths of light. C) Photosystem I functions first in the sequence of steps that make up the light reactions. D) Only photosystem I is found in the thylakoid membranes. E) Photosystem II does not transfer electrons from photons. Answer: B Topic: 7.7 Skill: Conceptual Understanding 38) Clusters of light-gathering pigments in a photosystem A) pass energy to the reaction center. B) are found in the roots of plants. C) absorb electrons. D) do not absorb photons. E) break down H2O. Answer: A Topic: 7.7 Skill: Factual Recall 39) In a photosystem, clusters of chlorophyll a, chlorophyll b, and carotenoid pigments function most like A) an electrical generator. B) an antenna. C) a propeller on a motorboat. 9 D) a windmill. E) a spring. Answer: B Topic: 7.7 Skill: Conceptual Understanding 40) The energy that excites P680 and P700 is supplied by A) electrons passing down the electron transport chain. B) the breaking of glucose bonds. C) ATP. D) photons. E) NADPH. Answer: D Topic: 7.8 Skill: Factual Recall 41) The electron transport chains of the light reactions A) are located in the stroma. B) are very different from those of cellular respiration. C) shuttle electrons along in a series of redox reactions. D) provide energy for the Krebs cycle. E) are found on the inner membrane of chloroplasts. Answer: C Topic: 7.8 Skill: Factual Recall 42) As a result of the cascade of electrons down the electron transport chains of the light reactions, A) NADPH is reduced to NADP+. B) NADPH is oxidized to NADP+. C) NADP+ is reduced to NADPH. D) NADP+ is oxidized to NADPH. E) water is formed. Answer: C Topic: 7.8 Skill: Factual Recall 43) The electrons lost from the reaction center of photosystem I are replaced b...
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- Fall '12