PS I has chlorophyll a molecule which absorbs maximum light of _________ nm ?
Correct answer: D. 700
- A. 600
- B. 650
- C. 680
- D. 700
Explanation
Photosystem I has a reaction-centre chlorophyll a molecule called P700 because it absorbs maximally at about 700 nm. Students may choose 680 nm by confusing P700 with P680, the reaction centre of photosystem II.
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