Question

If light is cut and $C{O}_2$ supply is continued then which of the following substance will get disappeared from photosynthesising algal cells?

• A. RUDP
• B. PGAL
• C. RUMP
• D. PGA

Answer 1

The correct option is A RUDP

A. RUDP or Ribulose-diphosphate is the protein that combines with carbon dioxide to form phosphoglyceraldehyde during carbon fixation.

B. PGAL or Phosphoglyceraldehyde is an intermediate in various metabolic pathways.

C. RUMP or Ribulose-monophosphate combines with ATP to form Ribulose-diphosphate which is required in dark reaction of photosynthesis during carbon fixation

D. PGA or Phosphoglyceric Acid is a three carbon compound which s the first stable product of Calvin cycle.

Hence, if light is cut and CO2 supply is continued, then RUDP will get disappeared from photosynthesising algal cells because it will combine with CO2 to form intermediates of C3 cycle of carbon fixation.

So, the correct answer is 'RUDP'.