Photosynthesis and Respiration – Section 1

36. Which enzyme is involved in carbon-fixation reaction?

A. NADP reductase
B. Cytochrome reductase
C. Ribulose bisphosphate carboxylase
D. Glycerol kinase

Correct Answer: C. Ribulose bisphosphate carboxylase

37. Assume the combined processes of photosynthesis and cellular respiration, the electrons that start as part of H2O at the beginning of the light reactions end up attaching to

A. O2 to make new H2O
B. NADPH to make new glucose
C. pyruvate to make ethanol
D. electron transport carriers to make O2

Correct Answer: A. O2 to make new H2O

38. In the initial step of photosynthesis, sunlight energizes the electron pair of

A. adenosine triphosphate (ATP)
B. chlorophyll pigments
C. water
D. carbon dioxide

Correct Answer: B. chlorophyll pigments

39. Rubisco (RuBP Carboxylase-oxygenase enzyme), glyceraldehyde 3-phosphate, and NADPH all play a role in

A. the dark reactions of photosynthesis
B. the breakdown of glucose into CO2
C. cellular respiration when O2 is present
D. alcohol fermentation

Correct Answer: A. the dark reactions of photosynthesis

40. The electrons that are released by the splitting of water during photosynthesis ultimately end up in

B. O2
D. rubisco

Correct Answer: C. NADPH

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