#osmosis MCQ

WATER POTENTIAL+PYQS

Increase in solute concentration causes water potential to:

Pick D: Become more negative. Thinking through WATER POTENTIAL step by step rules out the lookalikes and leaves Become more negative. Skip these: A) Increase; B) Become zero; C) Become less negative. 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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BASICS of PLANT+PYQS

A plant cell in isotonic solution becomes:

C fits best: Flaccid. Keep the BASICS of PLANT basics straight and Flaccid stands out as the precise answer. Avoid: A) Turgid; B) Plasmolysed; D) Burst. 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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BASICS of PLANT+PYQS

Wall pressure is exerted by:

Pick B: Cell wall on protoplast. Thinking through BASICS of PLANT step by step rules out the lookalikes and leaves Cell wall on protoplast. Skip these: A) Protoplast on wall; C) Vacuole on wall; D) Plasma membrane. 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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BASICS of PLANT+PYQS

Plant cell becomes turgid when placed in:

Hypotonic solution (C) is correct here. This is core BASICS of PLANT: once you know the definition or pathway step, Hypotonic solution is the clear fit. The wrong ones are A) Hypertonic solution; B) Isotonic solution; D) Concentrated salt. 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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BASICS of PLANT+PYQS

Hypotonic solution has _____ water potential compared to cell.

The right choice is C: Higher. In BASICS of PLANT, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Lower; B) Equal; D) Zero. 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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BASICS of PLANT+PYQS

A solution having higher solute concentration than the cell is called:

Correct option is C, Hypertonic. In BASICS of PLANT problems like this, the accurate statement is Hypertonic; the others are common mix-ups. Not these: A) Hypotonic; B) Isotonic; D) Iso-osmotic. 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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BASICS of PLANT+PYQS

Osmosis is best defined as movement of:

Answer: B) Water across semipermeable membrane. For BASICS of PLANT, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Solute across membrane; C) Ions across membrane; D) Gases across membrane. 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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