Multiple choice

Phytochrome occurs in two forms. In which of the following forms does it promote the germination of seeds of some species?

  1. Pfr form

  2. Pr form

  3. Both 1 and 2

  4. None of these

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If seeds sense light, they will germinate using their Pfr form. Pfr absorbs at a peak of 730 nm. The Pfr form is the active form that initiates biological responses. When Pfr absorbs far red light, it is converted to the Pr form.

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