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#plant light signalling question

3 public questions tagged with this topic.

cryptochrome

HY5 protein functions as:

Positive regulator of photomorphogenesis (B) is correct here. This is core cryptochrome: once you know the definition or pathway step, Positive regulator of photomorphogenesis is the clear fit. The wrong ones are A) Negative regulator of photomorphogenesis; C) Photoreceptor; D) Hormone. 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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PHYTOCHROME+PYQS

HY5 protein acts as a:

Correct option is C, Positive regulator of photomorphogenesis. In PHYTOCHROME problems like this, the accurate statement is Positive regulator of photomorphogenesis; the others are common mix-ups. Not these: A) Negative regulator; B) Photoreceptor; D) Enzyme. 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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PSS-Sec-E-Sensory biology

Degradation of PIFs occurs mainly in the presence of:

Correct option is B, Red light. In PSS-Sec-E-Sensory biology problems like this, the accurate statement is Red light; the others are common mix-ups. Not these: A) Darkness; C) Blue light; D) Far-red light. 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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