Part 1 of 3

Water and membranes

state

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state: give a concise answer.

Which statement describes osmosis?

Choose one answera.Movement of sugar molecules through a membrane from a high to a low concentrationb.Net movement of water through a partially permeable membrane, from a dilute to a more concentrated solutionc.Net movement of water from a concentrated solution to a more dilute solutiond.Movement of any substance through a membrane using energy from respiration

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Scope and sources

Cambridge IGCSE Biology 0610 · 2026–2028 v3 · Original learning materials.

Water as a solvent (3.2.1); osmosis through partially permeable membranes, in terms of water potential (3.2.2, Supplement 3.2.7); dialysis tubing (3.2.4) as a data investigation in the reading and practice; water entering and leaving cells (3.2.3) and plant tissue in sucrose solutions (3.2.5) through the potato-cylinder practical; support by turgor (3.2.6) with turgid, flaccid and plasmolysis (Supplement 3.2.8); water uptake and loss by organisms (Supplement 3.2.9). Masses in the experiment come from a teaching model.

Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.

Official Cambridge syllabus