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Question

The primary acceptor of carbon dioxide in C3 plants is a

A
2-carbon compound
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B
5-carbon compound
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C
3-carbon compound
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D
6-carbon compound
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Solution

The correct option is B 5-carbon compound
The primary acceptor of carbon dioxide during light independent reactions of photosynthesis in C3 plants is RuBP (ribulose-1,5-bisphosphate). It is a 5-carbon compound. RuBP combines with carbon dioxide in presence of RuBisCO to form an unstable 6-carbon compound which splits into two molecules of 3-PGA.

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