Practice question
Question
Phytochrome exists in two photoreversible forms known as:
Explanation
Correct option is B, Pr and Pfr. In PHYTOCHROME problems like this, the accurate statement is Pr and Pfr; the others are common mix-ups. Not these: A) P680 and P700; C) PSI and PSII; D) PhyA and PhyB. Tissue transport questions usually turn on xylem vs phloem, living vs dead cells, or source vs sink.
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