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Q.

Physiologically active form of a phytochrome is

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a

P680

b

P660/Pfr

c

P730/Pfr

d

P700

answer is A.

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Detailed Solution

The pigment that played a role in seed germination. Phytochrome is glycoprotein in nature. It has a light absorbing portion called chromophore. Phytochrome in plants occur in two inter convertible forms namely Pr(P680) and Pfr(P730).

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Physiologically active form of a phytochrome is