Phytochrome exists in two forms i.e., P660 and:
Correct answer: D. P700
- A. P307
- B. P370
- C. P703
- D. P700
Explanation
There are two photosystems, photosystem I (PS I) and photosystem II (PS II). These are named so in order of their discovery. Photosystem I has chlorophyll a molecule which absorbs maximum light of 700 nm and is called P700, whereas reaction center of photosystem II has P680, the form of chlorophyll a which absorbs best the light of 680 nm.
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