This plant pigment has two forms; one form absorbs red light and is then converted into the second form that absorbs far-red light. The second form, after absorption of far-red light, is converted back into the red absorbing form. This pigment is
A) cryptochrome.
B) phytochrome.
C) chlorophyll b.
D) beta carotene.
E) auxotropin.

Question

Quizplus · Accepted Answer

Phytochrome is the plant pigment that exists in two forms: one that absorbs red light and another that absorbs far-red light. These forms are interconvertible, depending on the light they absorb. This characteristic of phytochrome plays a crucial role in regulating plant development processes such as seed germination and flowering.

This Plant Pigment Has Two Forms; One Form Absorbs Red