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NEET Biology question

BiologyTransport in PlantsNEET

Not in NEET syllabus

Identify the correct statements from the following:

I. Accumulation of K⁺ ions in the guard cells does not require energy. II. A high pH favours stomatal opening. III. Movement of chloride ions into the guard cells occurs in response to the electrical differential created by K⁺ ions. IV. With the entry of several K⁺ ions and chloride ions, the water potential of guard cells increases.

Answer: (C)

Solution

I is false — K⁺ accumulation against its gradient is an active, ATP-dependent process. II is true — a rise in guard-cell pH favours the conversion of starch to malate and K⁺ uptake, promoting opening. III is true — Cl⁻ enters passively, driven by

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Question ID VK-127581