Q8 / 180 · JIPMER 2015 · Botany

Which of the following characteristics out of I, II and III are exhibited by $\mathrm{C}_4$ plants? I. Kranz anatomy. II. The product of photosynthesis is oxalo acetic acid. III. Both PEP carboxylase and ribulose-bis phosphate carboxylase act as carboxylating enzyme. Choose the corrent option.

  • A
    I and II, but not III
  • B
    II and III, but not I
  • C
    I and III, but not II
  • Correct answer
    D
    All of these

Solution

$\mathrm{C}_4$ plants have an alternative $\mathrm{CO}_2$ fixation pathways called Hatch and Slack cycle where OAA, a 4C compound is the first stable product. These plants have Kranz anatomy in leaf.

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

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