Choose the incorrect pair.

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Question

(D) In $C_3$ plants, the Calvin cycle occurs only in the mesophyll cells (one cell type).In $C_4$ plants, the Calvin cycle occurs in the bundle sheath

Vedclass · Accepted Answer

First $CO_2$ acceptor in $C_4$ plant - $RuBP$.

Vedclass · Answer

(D) In $C_3$ plants, the Calvin cycle occurs only in the mesophyll cells (one cell type).In $C_4$ plants, the Calvin cycle occurs in the bundle sheath cells, while the initial $CO_2$ fixation occurs in the mesophyll cells (two cell types).The first stable product of the Calvin cycle in $C_3$ plants is $3$-phosphoglyceric acid $(PGA)$.In $C_4$ plants, the primary $CO_2$ acceptor is phosphoenolpyruvate $(PEP)$, not $RuBP$. $RuBP$ is the primary $CO_2$ acceptor in $C_3$ plants.Therefore, the pair "First $CO_2$ acceptor in $C_4$ plant - $RuBP$" is incorrect.

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