The Energy That Excites The Photosystems Is Supplied By

Question: Atrazine is a widely used herbicide that binds to a protein in photosystem II, ultimately causing a breakdown in electron transport. Atrazine would first inhibit the production of

Answer: ATP

Question: In photophosphorylation, energy from electron flow is used to transport ________ from the ________ to the thylakoid compartment, generating a concentration gradient of ________.

Answer: H+; stroma; H+

Question: Which of the following has been a major source of ozone destruction over the past 50 years?

Answer: Chlorofluorocarbons (CFCs)

Question: In a photosystem, clusters of chlorophyll a, chlorophyll b, and carotenoid pigments function most like

Answer: an antenna

Question: In most green plants, chloroplasts are

Answer: concentrated in a zone of leaf tissue called the mesophyll.

Question: The energy that excites the photosystems is supplied by

Answer: photons

Question: If you expose a photosynthesizing plant to water that contains both radioactive H and radioactive O, in which of the products of photosynthesis will the radioactive H and O show up?

Answer: H in glucose and water; O in O2

Question: In this drawing of a chloroplast, which structure represents the thylakoid membrane?

Answer: structure C

Question: Which of the following are produced during the light reactions of photosynthesis?

Answer: ATP, NADPH, O2

Question: Photophosphorylation during photosynthesis differs from oxidative phosphorylation during cellular respiration in that

Answer: The final electron acceptor is NADP+ and not oxygen.