Question

Which of the following occurs in dark reaction of photosynthesis?

• A. Formation of ATP
• B. Release of O${}_2$
• C. Release of H${}_2$
• D. Synthesis of PGA/PGAL

Answer 1

Answer: (D)

Synthesis of PGA/PGAL

A. Formation of ATP- occurs in light reaction.

B. The release of O${}_2$- occurs in light reaction during photolysis of water.

C. The release of H${}_2$ occurs in light reaction during photolysis of water.

D. Synthesis of PGA/PGAL - occurs in dark reaction, it is a three-carbon compound which is the first stable product of the Calvin cycle.

Hence, the correct answer is 'Synthesis of PGA/PGAL'.