#plant molecular biology MCQ

VERNALIZATION & FLOWERING+PYQS

Loss of function mutation in VRN2 results in:

C fits best: Spring varieties that do not need vernalization. Keep the VERNALIZATION & FLOWERING basics straight and Spring varieties that do not need vernalization stands out as the precise answer. Avoid: A) Delayed flowering; B) Requirement of stronger cold; D) Loss of photoperiodism. 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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PSS-Sec-E-Sensory biology

Which E3 ubiquitin ligase represses photomorphogenesis in darkness?

The right choice is B: COP1. 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; C) SPA1; D) BIN2. 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

The FT–FD complex activates genes related to:

That points to B: Floral meristem identity. Compared with the other options, Floral meristem identity is the one that correctly describes the PSS-Sec-E-Sensory biology concept. The wrong ones are A) Root development; C) Leaf senescence; D) Phototropism. 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

Which protein forms a complex with FT in the shoot apical meristem?

FD (C) is correct here. This is core PSS-Sec-E-Sensory biology: once you know the definition or pathway step, FD is the clear fit. The wrong ones are A) FLC; B) CO; D) FRI. 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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ABCE & ABCDE MODEL +Synapdrgon flowering

RADIALIS (RAD) gene encodes a transcription factor of family:

Answer: B) MYB. For ABCE & ABCDE MODEL +Synapdrgon flowering, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) bHLH; C) MADS-box; D) AP2. 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

Which genes constitute class B in ABC model?

AP3 and PI (B) is correct here. This is core ABC MODEL: once you know the definition or pathway step, AP3 and PI is the clear fit. The wrong ones are A) AP1 and AP2; C) AG and SEP; D) LFY and AP1. 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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ABC MODEL+PYQS

Which genes constitute class A in ABC model?

That points to C: AP1 and AP2. Compared with the other options, AP1 and AP2 is the one that correctly describes the ABC MODEL concept. The wrong ones are A) AP3 and PI; B) AG only; D) AP2 and AG. 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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