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Phytochrome occurs in two forms. In whic...

Phytochrome occurs in two forms. In which form it promotes the germination of seeds of some species

A

`P_(fr)` forms

B

`P_(r)` forms

C

Both forms

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
`P_(fr)` (absorb for red) is a physiologically active form, `P_(r)` (absorb red light) is inactive
`underset(("Inactive in cytosol"))(P_(r)) underset("For red light")overset("Red light")hArr underset(("Active, attach to plasma membrane"))(P_(fr))`
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