#stomatal opening MCQ

STOMATA MOVEMENT +PYQS

Hyperpolarization of guard cell membrane leads to influx of:

Go with C — K⁺. Under STOMATA MOVEMENT, 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) Na⁺; B) Ca²⁺; D) H⁺. 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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STOMATA MOVEMENT +PYQS

Activation of H⁺-ATPase in guard cells results in:

Pick B: Hyperpolarization of membrane. Thinking through STOMATA MOVEMENT step by step rules out the lookalikes and leaves Hyperpolarization of membrane. Skip these: A) Depolarization of membrane; C) Inhibition of ion uptake; D) Stomatal closure. 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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STOMATA MOVEMENT +PYQS

Counter ion for K⁺ accumulation during stomatal opening is mainly:

That points to A: Cl⁻ and malate²⁻. Compared with the other options, Cl⁻ and malate²⁻ is the one that correctly describes the STOMATA MOVEMENT concept. The wrong ones are B) NO₃⁻ only; C) SO₄²⁻; D) PO₄³⁻. 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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STOMATA MOVEMENT +PYQS

Which ion influx is most crucial for stomatal opening?

C fits best: K⁺. Keep the STOMATA MOVEMENT basics straight and K⁺ stands out as the precise answer. Avoid: A) Na⁺; B) Ca²⁺; D) Mg²⁺. 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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