In the leaves of $C_{4}$ plants, malic acid formation during $C O_{2}$ fixation occurs in the cells of:

Epidermis

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Mesophyll

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Bundle sheath

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Phloem

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Solution

The correct option is B Mesophyll
In the mesophyll cells of C4 leaves, malic acid is formed by the reduction of oxalic acid.
From the chloroplasts of the mesophyll cells, malic acid is transfered to the chloroplasts of the bundle sheath cells where it is decarboxylated to form carbon dioxide and pyruvic acid.

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