#flower development

PSS-Sec-E-Sensory biology

Loss of APETALA2 results in floral organs:

Ca-St-St-Ca (B) is correct here. This is core PSS-Sec-E-Sensory biology: once you know the definition or pathway step, Ca-St-St-Ca is the clear fit. The wrong ones are A) Se-Pe-St-Ca; C) Se-Se-Ca-Ca; D) Pe-Pe-St-St. 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

Genes specifying ovule identity belong to class:

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

SEPALLATA genes belong to which class?

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

Floral quartet model involves formation of :

Correct option is C, Tetramers. In PSS-Sec-E-Sensory biology problems like this, the accurate statement is Tetramers; the others are common mix-ups. Not these: A) Dimers; B) Trimers; D) Pentamers. 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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ABCE & ABCDE MODEL +Synapdrgon flowering

Which of the following is NOT a MADS-box gene?

D fits best: AP2. Keep the ABCE & ABCDE MODEL +Synapdrgon flowering basics straight and AP2 stands out as the precise answer. Avoid: A) AG; B) PI; C) AP3. 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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ABCE & ABCDE MODEL +Synapdrgon flowering

Most floral organ identity genes belongs to which gene family?

Answer: B) MADS-box. 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) Homeobox; C) bHLH; D) MYB. 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

AP3/PI mutants show replacement of petals and stamens by:

Go with A — Sepals and carpels. Under ABC MODEL, 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) Carpels only; C) Sepals only; D) Petals only. 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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ABC MODEL+PYQS

If all five homeotic genes are mutated, flower develops into:

Leaf-like structures (C) is correct here. This is core ABC MODEL: once you know the definition or pathway step, Leaf-like structures is the clear fit. The wrong ones are A) Extra petals; B) Stamens only; D) Inflorescence. 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

Homeotic genes mainly encode:

Go with C — Transcription factors. Under ABC MODEL, 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) Structural proteins; B) Enzymes; D) Hormones. 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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ABC MODEL+PYQS

Loss of class C gene function leads to absence of:

That points to C: Stamens and carpels. Compared with the other options, Stamens and carpels is the one that correctly describes the ABC MODEL concept. The wrong ones are A) Sepals and petals; B) Petals and stamens; D) Sepals only. 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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ABC MODEL+PYQS

Mutation in class B genes results in absence of:

Pick B: Petals and stamens. Thinking through ABC MODEL step by step rules out the lookalikes and leaves Petals and stamens. Skip these: A) Sepals and petals; C) Stamens and carpels; D) Sepals only. 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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ABC MODEL+PYQS

If class A genes are mutated, which organs are absent?

Pick A: Sepals and petals. Thinking through ABC MODEL step by step rules out the lookalikes and leaves Sepals and petals. Skip these: B) Petals and stamens; C) Stamens and carpels; D) Sepals and carpels. 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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