Question

Which one of the following would not limit photosynthesis?

• A. Oxygen
• B. Carbon dioxide
• C. Light
• D. Chlorophyll

Answer 1

Answer: (A)

Oxygen

Oxygen is the by-product of photosynthesis. This oxygen is produced by photolysis of water. Photolysis is a part of the light-dependent reactions of photosynthesis which splits the water into 2H${}^{+}$ and oxygen along with the emission of two electrons. The electrons released during the photolysis is picked up by the photosystem I during light reaction. Oxygen does not limit the rate of photosynthesis as it is emitted as a waste product during photolysis.

So, the correct answer is option C.