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#phytochrome forms

2 public questions tagged with this topic.

PHYTOCHROME+PYQS

Phytochrome exists in two photoreversible forms known as:

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.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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PHOTOPERIODISM+PYQS

Phytochrome exists in two interconvertible forms known as:

Pr and Pfr (B) is correct here. This is core PHOTOPERIODISM: once you know the definition or pathway step, Pr and Pfr is the clear fit. The wrong ones are A) P680 and P700; C) PSI and PSII; D) FAD and FMN. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

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