#brassinosteroids

Phytohormone ALL PYQS

Plant steroid hormone brassinosteroid receptors are localized mainly on the:

The right choice is C: Plasma membrane. In Phytohormone 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) Nucleus; B) Cytosol; D) Chloroplast. 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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Brassinosteriod

BR application generally accelerates:

Go with B — Leaf senescence. Under Brassinosteriod, 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) Seed dormancy; C) Root hair growth; D) ABA signaling. 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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Brassinosteriod

BR-insensitive bri1 mutants exhibit:

Delayed senescence (B) is correct here. This is core Brassinosteriod: once you know the definition or pathway step, Delayed senescence is the clear fit. The wrong ones are A) Accelerated senescence; C) Early germination; D) Enhanced photomorphogenesis. 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

BR-deficient mutants like det2 show:

Correct option is C, Dwarfism. In Brassinosteriod problems like this, the accurate statement is Dwarfism; the others are common mix-ups. Not these: A) Tall phenotype; B) Delayed flowering; D) Early senescence. 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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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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Brassinosteriod

Brassinosteroids promote cell elongation mainly by:

Go with B — Enhancing GA response. Under Brassinosteriod, 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) Increasing ABA; C) Inhibiting auxin; D) Reducing ethylene. 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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Brassinosteriod

In absence of BR, BES1/BZR1 are retained in cytosol by:

A fits best: 14-3-3 proteins. Keep the Brassinosteriod basics straight and 14-3-3 proteins stands out as the precise answer. Avoid: B) Ubiquitin; C) BIN2; D) PP2A. 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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Brassinosteriod

Active BES1/BZR1 regulate gene expression by moving to:

That points to C: Nucleus. Compared with the other options, Nucleus is the one that correctly describes the Brassinosteriod concept. The wrong ones are A) Cytosol; B) Chloroplast; D) Vacuole. 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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Brassinosteriod

Dephosphorylation of BIN2 is mediated by:

That points to B: BSU1. Compared with the other options, BSU1 is the one that correctly describes the Brassinosteriod concept. The wrong ones are A) PP2A; C) CDG1; D) BAK1. 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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Brassinosteriod

BRI1 is localized on the:

That points to B: Plasma membrane. Compared with the other options, Plasma membrane is the one that correctly describes the Brassinosteriod concept. The wrong ones are A) Nuclear membrane; C) ER membrane; D) Tonoplast. 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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Brassinosteriod

The receptor for brassinosteroids is:

Correct option is C, BRI1. In Brassinosteriod problems like this, the accurate statement is BRI1; the others are common mix-ups. Not these: A) TIR1; B) GID1; D) PYL. 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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Brassinosteriod

Propiconazole inhibits brassinosteroid biosynthesis by blocking:

Answer: B) Cytochrome P450 enzymes. 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) Sterol transport; C) Kinase activity; D) BR receptors. 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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