EVERYDAY SCIENCE

Detailed explanation-1: -Phytochrome is a light sensitive pigment in plants and some bacteria and fungi. It exists in two interconvertible forms-Pr and Pfr. Pfr absorbs far red light of 730 nm wavelength. When it absorbs far red light, it converts to its original form, Pr.

Detailed explanation-2: -Complete answer: Phytochrome is a pigment that absorbs red light and far-red light.

Detailed explanation-3: -Phytochrome acts as a molecular switch in response to red and far-red light. It occurs in two reversible conformations (Pr and Pfr), which absorb red light (R) and far-red light (FR) respectively.

Detailed explanation-4: -Phytochromes have two photo-interconvertible forms: Pr and Pfr. Pr absorbs red light ( 667 nm) and is immediately converted to Pfr. Pfr absorbs far-red light ( 730 nm) and is quickly converted back to Pr.

Detailed explanation-5: -The phytochrome photoreceptors are proteins that bind a tetrapyrrole chromophore, allowing them to absorb light. These phytochromes exist in two photo-interconvertible forms: an inactive, red-absorbing “Pr” form and an active, far-red–absorbing “Pfr” form.