Question

The pigment that absorbs red and far red light in plant is

• A. Cytochrome.
• B. Xanthophyll.
• C. Phytochrome.
• D. Carotene.

Answer 1

The correct option is C Phytochrome.

Phytochrome is a photoreceptor, a pigment that plants, and some bacteria and fungi, use to detect light. It is sensitive to light in the red and far-red region of the visible spectrum. Many flowering plants use it to regulate the time of flowering based on the length of day and night (photoperiodism) and to set circadian rhythms. It also regulates other responses including the germination of seeds, elongation of seedlings, the size, shape, and number of leaves, the synthesis of chlorophyll, and the straightening of the epicotyl or hypocotyl hook of dicot seedlings.

So, the correct answer is option C.