Question

Phytochrome is a:

• A. Chromoprotein
• B. Flavoprotein
• C. Lipoprotein
• D. Glycoprotein

Answer 1

The correct option is A

Chromoprotein

The correct option is A.

Explanation of the correct answer:

1. Phytochrome is a chromoprotein.
2. It acts as a photoreceptor in plants.
3. It is sensitive to light in the red and far-red regions.
4. Phytochromes regulate processes linked with photoperiods like flowering, seed germination, chlorophyll synthesis, etc.

Explanation of the incorrect options:

Option B:

1. Phytochrome is a chromoprotein, not a flavoprotein.
2. Flavoproteins are oxidative enzymes containing FAD.
3. They help in photosynthesis and DNA repair.

Option C:

1. Phytochrome is a chromoprotein, not a lipoprotein.
2. Lipoproteins carry cholesterol through the bloodstream.

Option D:

1. Phytochrome is a chromoprotein, not a glycoprotein.
2. Glycoproteins are proteins containing glycans attached to an amino acid side-chain.
3. It helps in immunity.

Final answer: Phytochrome is a chromoprotein.