Question

Which pigment acts as the reaction center in Photosystem II?

• A. Chlorophyll a (P700)
• B. Chlorophyll b
• C. Chlorophyll a (P680)
• D. Carotenoids

Hint:

Remember: PS II = P680 and PS I = P700.

Answer 1

The Correct Option is C

Concept: Photosystems contain a reaction center where light energy is converted into chemical energy. Each photosystem has a specific chlorophyll a molecule acting as the reaction center.
Step 1: Understanding Photosystem II.}
Photosystem II (PS II) absorbs light maximally at 680 nm.
Step 2: Identifying the reaction center.}
The reaction center of PS II is a special form of chlorophyll a called P680.
Step 3: Eliminating other options.}

• P700 – Reaction center of Photosystem I.
• Chlorophyll b – Accessory pigment.
• Carotenoids – Accessory pigments.