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Name the red light sensitive system?

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Name the red light sensitive system?

(a) Phytochrome

(b) Cryptochrome

(c) Phototropin

(d) Xanthophyll

I had been asked this question in unit test.

My question is taken from Photomorphogenesis topic in section Plant Physiology of Life Sciences

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The correct option is (a) Phytochrome

Easy explanation: There are two light sensitive systems involved in photomorphogenesis. One is the red light response and the other one is the blue light response. Red light sensitive system is known as phytochrome while blue light system is called as cryptochrome.

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