🔬 Biology · Photosynthesis in Higher Plants · NEET

In the Calvin cycle, carbon dioxide is first attached to the 5-carbon molecule:

A RuBP
B glucose
C pyruvate
D plain ATP

Correct answer: A. RuBP

Explanation: CO₂ combines with ribulose-1,5-bisphosphate (RuBP) in carbon fixation.

Concept context

Light reactions, the Calvin cycle, C3/C4/CAM pathways, photorespiration, and factors affecting the rate of photosynthesis. One of the highest-yield NEET chapters.

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In the Calvin cycle, carbon dioxide is first attached to the 5-carbon molecule:

Concept context

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