#flowering regulation

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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PHOTOPERIODISM+PYQS

CO protein is stable mainly under:

Answer: C) Light conditions. For PHOTOPERIODISM, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Dark conditions; B) Short days; D) Low temperature. 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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ABC MODEL+PYQS

Polycomb proteins regulate flowering by:

The right choice is B: Repressing floral genes. In ABC MODEL, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Activating MADS-box genes; C) Degrading transcription factors; D) Transporting hormones. 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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