Refer to the Table Below Summarizing Data from an Experiment

question 124

Multiple Choice

Refer to the table below summarizing data from an experiment conducted using chloroplasts isolated from spinach leaves.The chloroplasts were incubated with either no compound (control) or with compound A or B for 1 hour.Chloroplasts were then tested for the three functions listed at the top of the table. What do these data suggest about the role of NADPH in photosynthesis and why?

• A) NADPH is required for photosynthesis because Calvin cycle function is blocked when noncyclic electron transport is inhibited.
• B) NADPH is required for photosynthesis because Calvin cycle function is not blocked when cyclic electron transport is inhibited.
• C) NADPH is required for photosynthesis because cyclic electron transport can function independently of noncyclic electron transport.
• D) NADPH is not required for photosynthesis because cyclic electron transport can function even when noncyclic electron transport is inhibited.
• E) NADPH is not required for photosynthesis because different chemical agents can inhibit cyclic and noncyclic electron transport separately.

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