Phytochrome is converted from the inactive to the active form by being exposed to light of what color?
A) far red
B) red
C) yellow
D) blue
E) violet

Question

Phytochrome is converted from the inactive to the active form by being exposed to light of what color?
A) ​far red
B) ​red
C) ​yellow
D) ​blue
E) ​violet

Quizplus · Accepted Answer

Phytochrome is a pigment protein that is responsible for regulating many physiological processes in plants, including seed germination, stem growth, and flowering. When phytochrome is exposed to red light, it undergoes a structural change that activates its function. Specifically, the red light is absorbed by the pigment's chromophore, causing it to switch from its inactive to its active form. In contrast, far-red light (A) actually reverses this process by converting active phytochrome back into its inactive form. Yellow (C), blue (D), and violet (E) light are not directly involved in phytochrome activation.

Phytochrome Is Converted from the Inactive to the Active Form