Multiple choice

Which of the following statements is correct about C4 carbon fixation?

  1. 4-carbon acid transported from mesophyll cells may be pyruvate or alanine.

  2. 3-carbon acid transported back from bundle-sheath cells may be malate or aspartate.

  3. Enzyme that catalyses decarboxylation in maize and sugarcane is NADP-malic enzyme.

  4. Enzyme that catalyses decarboxylation in millet is PEP carboxykinase.

  5. Enzyme that catalyses decarboxylation in Panicum maximum is NAD-malic enzyme.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Enzyme that catalyses decarboxylation in bundle-sheath cells differs. In maize and sugarcane, the enzyme is NADP-malic enzyme.

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