Question

What is the first stable intermediate product of
photosynthesis?
(a) Glucose
(b) Formaldehyde
(c) Phosphoglyceric acid
(d) Malate

Answer 1

Answer:

c)/Phosphoglyceric acid is first stable intermediate product of photosynthesis.

Answer 2

The first stable intermediate product of  photosynthesis is the (c) Phosphoglyceric acid.

• In most plants, a tri-carbon compound is the first stable intermediate of the carbon dioxide reduction. Therefore this type of carbon reduction is called as cycle C3.
• RuBisCO, which carboxylates Ribulose-1,5 bisphosphate (RUBP) into phosphoglyceric acid, produces an initial carboxylation in the C3 cycle.
• Subsequently, the phosphoglyceric acid is reduced to phosphoglyceraldehyde that is used to synthesize sugars and recycle RUBP.