Question

The oxygen produced during photosynthesis comes from the photolysis of water was the first time proved by

• A. Malvin Calvin
• B. Blackman
• C. Robert Mayer
• D. Ruben and Kamen

Answer 1

The correct option is D

Ruben and Kamen

The correct answer is option D.

Explanation of the correct option:

1. Photosynthesis is the process by which green plants synthesize glucose by utilizing carbon dioxide and water in the presence of chlorophyll.
2. Protolysis is a light-dependent reaction.
3. Samuel Ruben and Martin Kamen used radioactive isotopes in their experiments and proved that oxygen is released during the photolysis of water.

Explanation of the incorrect options:

Option A:

The chemical pathway for photosynthesis was found by Malvin Calvin.

Option B:

At moderate light intensity, Blackman argued, the "light" reaction restricts or "paces" the entire process.

Option C:

The notion of energy conservation was developed by Robert Mayor.

Final answer: The oxygen produced during photosynthesis comes from the photolysis of water was the first time proved by Ruben and Kamen.