ReNEET 2026 · Biology · Q102Photosynthesis in Higher PlantsIn our bank: Strong match · 85%
Which pigment has an absorption peak at 700 nm in the photosynthetic reaction centre PS I (P700)?
- A.Chlorophyll b
- B.Chlorophyll a✓
- C.Xanthophylls
- D.Carotenoids
Correct Answer
(B) Chlorophyll a
Solution & Explanation
In photosystem I the reaction-centre chlorophyll a has an absorption maximum at 700 nm and is therefore designated P700. (In PS II the reaction centre chlorophyll a absorbs at 680 nm, P680.)
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