Practice question
Question
Far-red light converts phytochrome Pfr to:
Explanation
Go with A — Pr. Under PSS-Sec-E-Sensory biology, this is the standard explanation you’d use in class: it names the real driver or definition, while the rest are nearby but wrong. Not these: B) Pfr; C) Inactive P; D) Chromophore. When two options sound similar, choose the one that matches the textbook definition most tightly.
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