NEET 2004 Biology question

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

(1)Oxaloacetic acid
(2)3-phosphoglyceric acidCorrect
(3)Phosphoglyceraldehyde
(4)Malic acid

Answer: (2)

Solution

In plants is fixed in the Calvin cycle by RuBisCO, which carboxylates ribulose 1,5-bisphosphate (RuBP); the resulting unstable 6-carbon compound splits into two molecules of 3-phosphoglyceric acid (PGA), a 3-carbon acid. PGA is therefore the first

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Question ID VK-089455