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Assertion: Phytochrome exists in two for...

Assertion: Phytochrome exists in two form `P_(r)` and `P_("fr")` form inhibit flowering.

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

B

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

C

If the assertion is true but the reason is false

D

If both the assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
C
Photoperiodic stimulus is believed to be perceived by phytochrome. It is a blue-green pigment existing in two inter-convertible forms: `P_(f r) or P_(730)` (absorb far-red light) and `P_(r) or P_(660)` (absorb red light). By absorbing red light `P_(r)` is converted to `P_(f r)` rapidly. `P_(f r)` Physiologically active form, `P_(r)` is inactive.
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