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(D) The $C_4$ cycle involves the following steps:$1$. $CO_2$ fixation: $CO_2$ is fixed in the mesophyll cells by the enzyme $PEP$ carboxylase to form

Vedclass · Accepted Answer

$CO_2$ fixation $\rightarrow$ Transport $\rightarrow$ Decarboxylation

Vedclass · Answer

(D) The $C_4$ cycle involves the following steps:$1$. $CO_2$ fixation: $CO_2$ is fixed in the mesophyll cells by the enzyme $PEP$ carboxylase to form a $4$-carbon compound (oxaloacetate).$2$. Transport: This $4$-carbon compound is transported from the mesophyll cells to the bundle sheath cells.$3$. Decarboxylation: In the bundle sheath cells,the $4$-carbon compound undergoes decarboxylation to release $CO_2$ for the Calvin cycle.Therefore,the correct sequence is $CO_2$ fixation $\rightarrow$ Transport $\rightarrow$ Decarboxylation.

Choose the correct sequence of steps involved in the $C_4$ cycle.

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