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Consider the following statements.
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Consider the following statements.
(A) PS I was discovered before PS II.
(B) Each photosystem has many reaction centres.
(C) Both reaction centres are chlorophyll a molecules.
(D) PS II reaction centre absorbs maximally at 680 nm.
Which of these are correct?
Your answer:
Correct answer: (d)
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Explanation
Why (d) is correct
A (PS I was discovered first, hence its name), C (both reaction centres are chlorophyll a) and D (P680) are correct. B is wrong: each photosystem has only one reaction centre.
Why the other options are wrong
- (a) · your answer B is wrong.
- (b) · your answer B is wrong, and A and C are correct.
- (c) · your answer B is wrong.
NCERT point: Photosystems are named in order of discovery.
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