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Question

Phytochrome is a
  1. Lipoprotein.
  2. Flavoprotein.
  3. Chromoprotein.
  4. Glycoprotein.

A
Glycoprotein.
B
Lipoprotein.
C
Chromoprotein.
D
Flavoprotein.
Solution
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Proteins having pigmented prosthetic group are referred to as chromoproteins. Phytochromes is a chromoprotein, e.g., phytochrome A and phytochrome B that regulate flowering in plants by under different light conditions by absorption of red or far red light by their pigment.
Therefore, the correct answer is option B.

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