The light-independent reaction (Calvin cycle) Quiz
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5 questions, one answer each
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1. What is the first stable product of carbon dioxide fixation?
- A. RuBP
- B. Triose phosphate
- C. GP
- D. Hexose
2. Which statement about the reduction of GP is correct?
- A. It uses ATP and reduced NADP
- B. It releases ATP
- C. It produces reduced NADP
- D. It requires light directly
3. What happens to the RuBP concentration when the carbon dioxide supply is cut but light continues?
- A. Falls
- B. Rises
- C. Stays at zero
- D. Is converted to GP
4. Why can only some triose phosphate be used to make hexose sugars?
- A. The rest is needed to regenerate RuBP
- B. Hexose sugars need ATP made only in the dark
- C. Triose phosphate is toxic in large amounts
- D. Rubisco cannot use more
5. In a tracer experiment with 14CO2, which compound contains label first?
- A. Triose phosphate
- B. Hexose
- C. RuBP
- D. GP