#light signalling in plants

Phototropin+All PYQS

Phototropin is classified as:

The right choice is B: Flavoprotein kinase. In Phototropin+All, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Phytochrome; C) Steroid receptor; D) Ion channel. 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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PHYTOCHROME+PYQS

Which protein helps transport phyA into the nucleus?

C fits best: FHY1. Keep the PHYTOCHROME basics straight and FHY1 stands out as the precise answer. Avoid: A) HY5; B) COP1; D) SPA1. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.

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

In darkness, COP1 is localized mainly in the:

Pick C: Nucleus. Thinking through PHYTOCHROME step by step rules out the lookalikes and leaves Nucleus. Skip these: A) Chloroplast; B) Cytoplasm; D) Cell wall. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.

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

COP1 protein functions mainly as:

Pick C: E3 ubiquitin ligase. Thinking through PHYTOCHROME step by step rules out the lookalikes and leaves E3 ubiquitin ligase. Skip these: A) Transcription factor; B) Kinase; D) Photoreceptor. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.

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

In light, Pfr binding to PIFs results in:

Pick B: Degradation of PIFs. Thinking through PHYTOCHROME step by step rules out the lookalikes and leaves Degradation of PIFs. Skip these: A) Activation of PIFs; C) Nuclear export of phytochrome; D) Inhibition of HY5. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.

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

Phytochrome-mediated nuclear import occurs upon conversion to:

The right choice is B: Pfr. In PSS-Sec-E-Sensory biology, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Pr; C) Inactive form; D) Phototropin. 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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PSS-Sec-E-Sensory biology

Pfr induces degradation of which transcription factors?

The right choice is C: PIFs. In PSS-Sec-E-Sensory biology, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) HY5; B) COP1; D) LAF1. 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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PSS-Sec-E-Sensory biology

Which phytochrome form is physiologically active?

That points to B: Pfr. Compared with the other options, Pfr is the one that correctly describes the PSS-Sec-E-Sensory biology concept. The wrong ones are A) Pr; C) Both; D) Neither. 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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