Mammalian eyes sense light because the photoreceptor cells have molecules called "opsins", which change structure when exposed to light. Which of the following plant molecules would be analogous to mammalian opsins in their light-sensing ability?

Question

Quizplus · Accepted Answer

Pfr (far-red light absorbing form of the phytochrome protein) and phytochrome are the plant molecules analogous to mammalian opsins in their light-sensing ability. They change structure when exposed to light and are involved in regulating plant growth and development in response to light conditions. Auxin and cytokinins are plant hormones involved in growth and development, and phototropins are plant proteins involved in responding to directional light cues.

Mammalian Eyes Sense Light Because the Photoreceptor Cells Have Molecules