Published by:
CGP EDU Academic Team
Published on: August 21, 2026
Which of the following is correct about the action spectrum and absorption of photosynthesis?
A
The rate of photosynthesis is highest in blue and green light, showing high absorption.
B
The curve obtained for the rate of photosynthesis shows the most overlapping with the absorption of chlorophyll 
.
. C
In Photosystem I, the reaction centre chlorophyll 
has an absorption peak at 680 nm , hence it is called P680.
has an absorption peak at 680 nm , hence it is called P680. D
In Photosystem II, the reaction centre chlorophyll 
has an absorption maximum at 700 nm , and is called P700.
has an absorption maximum at 700 nm , and is called P700.
Text Solution
Verified by ExpertsThe correct answer is:
B
Photosynthesis rate is highest in blue and red light, and lowest in green (green is mostly reflected). The action spectrum (rate of photosynthesis vs wavelength) largely overlaps with the absorption spectrum of chlorophyll 
(the primary pigment). In PS I the reaction center chlorophyll 
has an absorption peak at 700 nm, hence is called P700, while in PS II it has absorption maxima at 680 nm, and is called P680.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Physics
A juggler throws balls into air. He throws one, whenever the previous one is at its highest…
A small block of mass is moving on as mooth horizontal table surface at initial speed . It then m…
A 400 g solid cube having an edge of length 10 cm floats in water. How much volume of the cube is o…
The escape velocities of two planets and are in the ratio . If the ratio of their radii respecti…
Taking into account of the significant figures, what is the value of ?
Time period of a compound pendulum is , if its mass is doubled, then its times period will be: