Practice question

MCQ

Question

The Pfr form of phytochrome absorbs light maximally at:

Options

Choose one · Correct answer highlighted

660 nm 680 nm 730 nm Correct 480 nm

Explanation

C fits best: 730 nm. Keep the PHOTOPERIODISM basics straight and 730 nm stands out as the precise answer. Avoid: A) 660 nm; B) 680 nm; D) 480 nm. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.

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