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NEET2004BotanyPhotosynthesis in Higher PlantsActual

In C ₃ plants, the first stable product of photosynthesis during the dark reaction is:

Options

  1. Amalic acid
  2. Boxaloacetic acid
  3. C3-phosphoglyceric acid
  4. Dphosphoglyceraldehyde.

Correct answer

C. 3-phosphoglyceric acid

Step-by-step solution

The first stable product of CO ₂ fixation in C ₃ plants is a three-carbon organic acid. The enzyme ribulose-1,5-bisphosphate carboxylase-oxygenase (RuBisCO) combines CO ₂ with the ribulose 1,5-bisphosphate to form two molecules of 3-phosphoglyceric acid. Related Theory A D P, N A D P , and glucose are the end products of the C₃ cycle. ADP and NADP are produced in the first stage of C ₃ cycle. In the second stage, glucose is produced.

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