Q. Which pigment has absorption peak at 700 nm in the photosynthetic reaction centre PS I (P700)?
A) Carotenoids
B) Chlorophyll b
C) Chlorophyll a
D) Xanthophylls
Explanation
[Solution from source] The reaction centre of both photosystems is a special chlorophyll a molecule; in PS I it absorbs maximally at 700 nm (P700). Other pigments are accessory antenna pigments. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.