#cryptochrome signalling

cryptochrome

In plants overexpressing CIB1, flowering occurs:

Correct option is C, Earlier than wild type. In cryptochrome problems like this, the accurate statement is Earlier than wild type; the others are common mix-ups. Not these: A) Later than wild type; B) Same time as wild type; D) Only under short days. 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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cryptochrome

FT protein regulated by cryptochrome signaling acts as:

That points to B: Florigen. Compared with the other options, Florigen is the one that correctly describes the cryptochrome concept. The wrong ones are A) Photoreceptor; C) Repressor; D) Enzyme. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.

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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cryptochrome

CIB1 regulates flowering by binding to promoter of:

FT (C) is correct here. This is core cryptochrome: once you know the definition or pathway step, FT is the clear fit. The wrong ones are A) AP1; B) LFY; D) FLC. 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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cryptochrome

Blue light activation of cry1 results in:

The right choice is B: Sequestration of COP1/SPA1. In cryptochrome, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Enhanced COP1 activity; C) HY5 degradation; D) Reduced transcription. 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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