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#guard cell physiology

3 public questions tagged with this topic.

STOMATA MOVEMENT +PYQS

DCMU inhibits stomatal opening by inhibiting:

Photosynthetic electron transport (B) is correct here. This is core STOMATA MOVEMENT: once you know the definition or pathway step, Photosynthetic electron transport is the clear fit. The wrong ones are A) Respiration; C) Ion channels; D) ATP synthesis in mitochondria. 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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STOMATA MOVEMENT +PYQS

Low intercellular CO₂ concentration causes stomata to:

Pick C: Open. Thinking through STOMATA MOVEMENT step by step rules out the lookalikes and leaves Open. Skip these: A) Close; B) Remain unchanged; D) Undergo plasmolysis. 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

Driving force for water entry into guard cells during opening is:

Go with B — Decreased water potential. 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) Increased water potential; C) Increased pressure potential; D) Reduced osmotic pressure. 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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