Question

A molecule of chlorophyll which acts as reaction centre in pigment system–II is _________

• A. P–650
• B. P–700
• C. P–673
• D. P–680

Hint:

{PS-II → P–680} and {PS-I → P–700}.

Answer 1

The Correct Option is D

Step 1: Understanding pigment systems.
Photosynthesis involves two pigment systems: Photosystem I and Photosystem II, each having a specific reaction centre chlorophyll.

Step 2: Identifying reaction centre of PS-II.
The reaction centre of Photosystem II absorbs light maximally at 680 nm, hence it is known as P–680.

Step 3: Conclusion.
Therefore, the correct answer is (D) P–680.