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InterviewSolution
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Which of the following equations holds true for acidification reactions of CAM pathway?A. `PEP+CO_(2)+H_(2)Ooverset("PEPCase")rarrOA A+H_(3)PO_(4)`B. `OA A+NADHoverset("Dehydrogenase")rarr"Malic acid"+NAD^(+)`C. `"Malic acid"+NADP^(+)underset("enzyme")overset("Malic")rarr"Pyruvic acid"+CO+NADPH`D. |
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Answer» Correct Answer - D Crassulacean plants have developed a unique mechanism to perform photosynthesis without much loss of water. They perform acidification or dark fixation of `C_(2)` during night and deacidification during day. During night. When acid (PEP) to form oxaloacetic acid (O A A) in the presence of enzyme PEP carboxylase. OA A is subsequencly converted to malic acid in the presence of enzyme malic dehydrogenase. Malic acid produced in dark as a result of acidification is stored in the vacuoles. During day. When stomata are closed, the malic acid is decarboxylated to produce pyruvic acid and evolve `CO_(2)` (deacidification) |
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