Q30 / 160 · JIPMER 2011 · Botany

In leaves of $\mathrm{C}_4$ plants malic acid synthesis during $\mathrm{CO}_2$ fixation occurs in

  • A
    bundle sheath
  • Correct answer
    B
    mesophyll
  • C
    epidermis
  • D
    guard cells

Solution

In $\mathrm{C}_4$-plants $\mathrm{CO}_2$ combines with phosphoenol pyruvic acid to form oxaloacetic acid in mesophyll chloroplasts. It is further reduced to malic acid which is transferred to chloroplast in bundle sheath cells.

Hence, the correct answer is option: 'B'.

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