#plant physiology question

Phototropin+All PYQS

phot1 phot2 double mutant shows:

Go with D — No chloroplast movement. Under Phototropin+All, this is the standard explanation you’d use in class: it names the real driver or definition, while the rest are nearby but wrong. Not these: A) Normal responses; B) Only accumulation; C) Only avoidance. When two options sound similar, choose the one that matches the textbook definition most tightly.

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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Phototropin+All PYQS

phot1 mutant shows:

Answer: B) Poor accumulation response. For Phototropin+All, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Normal accumulation and avoidance; C) Loss of avoidance response; D) No phototropism. 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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cryptochrome

Which cryptochrome has photolyase activity?

The right choice is C: CRY3. 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) CRY1; B) CRY2; D) None. 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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cryptochrome

CRY3 protein is localized primarily in:

Correct option is B, Chloroplasts and mitochondria. In cryptochrome problems like this, the accurate statement is Chloroplasts and mitochondria; the others are common mix-ups. Not these: A) Nucleus only; C) Plasma membrane; D) Cell wall. 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

Cryptochrome localization in plant cells is mainly in the:

The right choice is C: Nucleus. 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) Cytoplasm; B) Plasma membrane; D) Cell wall. 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

Phytochrome interacting factors (PIFs) primarily act as:

The right choice is B: Negative regulators of photomorphogenesis. In PHYTOCHROME, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Positive regulators of photomorphogenesis; C) Photoreceptors; D) 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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PHYTOCHROME+PYQS

Which phytochrome isoform is light-labile and rapidly degraded?

A fits best: PhyA. Keep the PHYTOCHROME basics straight and PhyA stands out as the precise answer. Avoid: B) PhyB; C) PhyC; D) PhyD. 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

PhyB is most strongly associated with regulation of:

Pick B: Shade avoidance. Thinking through PHYTOCHROME step by step rules out the lookalikes and leaves Shade avoidance. Skip these: A) Seed germination; C) Vernalization; D) Stomatal movement. 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

Phytochrome is a photoreceptor that primarily absorbs:

That points to C: Red and far-red light. Compared with the other options, Red and far-red light is the one that correctly describes the PHYTOCHROME concept. The wrong ones are A) Blue light; B) Green light; D) UV-B light. 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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VERNALIZATION & FLOWERING+PYQS

Cold requirement for germination of seeds is termed:

The right choice is C: Stratification. In VERNALIZATION & FLOWERING, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Vernalization; B) Photoperiodism; D) Dormancy. 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

HY5 accumulation promotes:

Correct option is B, Photomorphogenesis. In PSS-Sec-E-Sensory biology problems like this, the accurate statement is Photomorphogenesis; the others are common mix-ups. Not these: A) Etiolation; C) Stem elongation; D) Dormancy. 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

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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