The wavelength of light absorbed by Pr form of phytochrome is

Options

(a) 680 nm
(b) 720 nm
(c) 620 nm
(d) 640 nm

Correct Answer:

680 nm

Explanation:

The Pr form absorbs light between 660 to 680 nm and absorbs at a peak of 666 nm. It is the form synthesized in dark-grown seedlings. When Pr absorbs red light, it is converted to the Pfr form.