This Plant Pigment Has Two Forms; One Form Absorbs Red

question 7

Multiple Choice

This plant pigment has two forms; one form absorbs red light and is then converted into the second form that absorbs far-red light. The second form, after absorption of far-red light, is converted back into the red absorbing form. This pigment is

• A) cryptochrome.
• B) phytochrome.
• C) chlorophyll b.
• D) beta carotene.
• E) auxotropin.

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