Practice question
Question
The Pr form of phytochrome absorbs light maximally at:
Explanation
That points to B: 660 nm. Compared with the other options, 660 nm is the one that correctly describes the PHOTOPERIODISM concept. The wrong ones are A) 730 nm; C) 450 nm; D) 550 nm. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.
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