#photomorphogenesis

Phytohormone ALL PYQS

DELLA proteins promote photomorphogenesis by:

Binding PIFs and blocking transcription (B) is correct here. This is core Phytohormone ALL: once you know the definition or pathway step, Binding PIFs and blocking transcription is the clear fit. The wrong ones are A) Activating PIFs; C) Enhancing GA biosynthesis; D) Activating COP1. 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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Brassinosteriod

Which hormones jointly suppress photomorphogenesis in dark?

Answer: B) GA & BR. For Brassinosteriod, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Auxin & CK; C) ABA & ET; D) SA & JA. 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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Brassinosteriod

Brassinosteroids suppress photomorphogenesis in:

B fits best: Dark. Keep the Brassinosteriod basics straight and Dark stands out as the precise answer. Avoid: A) Light; C) UV; D) Red light. 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

Exposure of etiolated seedlings to light results in:

B fits best: De-etiolation. Keep the PHYTOCHROME basics straight and De-etiolation stands out as the precise answer. Avoid: A) Skotomorphogenesis; C) Dormancy; D) Vernalization. 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

Phytochrome functions mainly to regulate:

Go with B — Photomorphogenesis. Under PHYTOCHROME, 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) Photosynthesis only; C) Transpiration; D) Respiration. 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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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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PSS-Sec-E-Sensory biology

Photomorphogenesis is promoted by:

Pfr form (B) is correct here. This is core PSS-Sec-E-Sensory biology: once you know the definition or pathway step, Pfr form is the clear fit. The wrong ones are A) Pr form; C) Darkness; D) Ethylene. 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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PSS-Sec-E-Sensory biology

Red light converts phytochrome Pr to:

Answer: C) Pfr. For PSS-Sec-E-Sensory biology, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Pr; B) Inactive form; D) UVR8. 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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PSS-Sec-E-Sensory biology

Far-red light converts phytochrome Pfr to:

Go with A — Pr. Under PSS-Sec-E-Sensory biology, 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: B) Pfr; C) Inactive P; D) Chromophore. 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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PSS-Sec-E-Sensory biology

Which protein ubiquitinates nuclear proteins during photomorphogenesis regulation?

Pick C: COP1. Thinking through PSS-Sec-E-Sensory biology step by step rules out the lookalikes and leaves COP1. Skip these: A) HY5; B) PhyA; D) LAF1. 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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