Which sequence of events is true about phtyochrome? A)Red light activates phytochrome,converting it to P_fr,activated P_fr moves to the nucleus,then P_ris a receptor for red light in the cytosol. B)P_r is a receptor for red light in the cytosol,red light activates phytochrome,converting it to P_fr,then activated P_fr moves to the nucleus. C)P_r is a receptor for red light in the cytosol,activated P_fr moves to the nucleus,then red light activates phytochrome,converting it to P_fr.

Question

Quizplus · Accepted Answer

According to current understanding, red light activates phytochrome, converting it to the active form P_fr. This activated phytochrome then moves to the nucleus, where it acts as a transcription factor to regulate gene expression. P_r is a receptor for red light in the cytosol, and it is converted to P_fr upon activation by red light. Therefore, option B best represents the sequence of events.

Which Sequence of Events Is True About Phtyochrome