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#photoreceptors in plants

3 public questions tagged with this topic.

PHYTOCHROME+PYQS

Photoreversibility of phytochrome refers to:

Answer: B) Interconversion between Pr and Pfr. For PHYTOCHROME, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Degradation of phytochrome in light; C) Binding of chromophore; D) Movement into nucleus. Name the process first, then pick the option that describes it — don’t reverse cause and effect.

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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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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STOMATA MOVEMENT +PYQS

Which photoreceptors regulate blue light response in guard cells?

The right choice is B: Phototropins. In STOMATA MOVEMENT, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Phytochromes; C) UVR8; D) Cryptochromes. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.

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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