Which cryptochrome isoform primarily inhibits hypocotyl elongation?
Correct option is A, CRY1. In cryptochrome problems like this, the accurate statement is CRY1; the others are common mix-ups. Not these: B) CRY2; C) CRY3; D) All equally. Tissue transport questions usually turn on xylem vs phloem, living vs dead cells, or source vs sink.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.