Photosynthesis and Respiration – Section 1

26. Which of the following serves as a reactant in photosynthesis and a product in cellular respiration?

A. O2
B. CO2
C. Sunlight
D. ATP

Correct Answer: B. CO2

27. Hydrogen (electron) acceptor in the light reactions is

A. ADP
B. NADP+
C. NAD+
D. FADH

Correct Answer: B. NADP+

28. The cytochrome c oxidase complex

A. accepts electrons from cyt c
B. donates four electrons to O2
C. pumps protons out of the matrix space
D. all of these

Correct Answer: D. all of these

29. In the Calvin cycle, carbon dioxide is fixed in a reaction with the

A. ribulose diphosphate
B. ribulose phosphate
C. ribose triphosphate
D. 3-phosphoglyceric acid

Correct Answer: A. ribulose diphosphate

30. What do NAD+, NADP+, and FAD+ all have in common?

A. They are reduced
B. They have a full complement of electrons
C. They are oxidized
D. They are what is used during carbon fixation in photosynthesis

Correct Answer: C. They are oxidized

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