What is the primary role of RuBisCO in the Calvin cycle?

A To reduce ATP to ADP.

B To fix carbon dioxide to RuBP.

C To oxidize NADPH to NADP+.

D To split water molecules.

✓ Correct Answer: Option B

RuBisCO (ribulose-1,5-bisphosphate carboxylase/oxygenase) is the enzyme responsible for carbon fixation in the Calvin cycle, catalyzing the reaction between carbon dioxide and ribulose-1,5-bisphosphate (RuBP).

💡 Why is B) the correct answer?

The correct answer to the question "What is the primary role of RuBisCO in the Calvin cycle?" is Option B: To fix carbon dioxide to RuBP..

The other options — A) To reduce ATP to ADP., C) To oxidize NADPH to NADP+., D) To split water molecules. — are incorrect for this IB Exam Prep question. As explained above: RuBisCO (ribulose-1,5-bisphosphate carboxylase/oxygenase) is the enzyme responsible for carbon fixation in the Calvin cycle, catalyzing the reaction between carbon dioxide and ribulose-1,5-bisphospha…

📚 About This IB Exam Prep Practice Question

This 3-level IB Exam Prep question from the Biology topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free IB Exam Prep practice test or use flashcards for spaced repetition review.

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What is the primary role of RuBisCO in the Calvin cycle?

✓ Correct Answer: Option B

📚 About This IB Exam Prep Practice Question

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