Question

exam lesson name: the cell and its processes
exam number: 700942rr
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question 12 of 20 :
select the best answer for the question.

1. what cycle do the light-independent reactions use to turn carbon dioxide into glucose?

○ a. krebs cycle
○ b. electron transport cycle
○ c. calvin cycle
○ d. glycolytic cycle

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Explanation:

To solve this, we analyze each option:

• Option A: The Krebs cycle (also known as the citric acid cycle) is involved in cellular respiration, breaking down glucose to produce energy, not fixing carbon dioxide into glucose.
• Option B: The electron transport chain is part of cellular respiration, involved in generating ATP using electrons, not carbon fixation.
• Option C: The Calvin cycle (light - independent reactions) in photosynthesis uses carbon dioxide, ATP, and NADPH to produce glucose.
• Option D: Glycolysis is the first step of cellular respiration, breaking down glucose into pyruvate, not building glucose from carbon dioxide.

So the correct answer is the one related to carbon fixation in photosynthesis.

Answer:

C. Calvin cycle