A tool by Leon Dudhill
Correct0
Total0
Accuracy —
Streak0
Quick Ref
Diff.Osmo.AT
SubstanceAnyWaterAny
DirectionHigh → lowHigh → low water potentialLow → high
Energy?NoNoYes (ATP)
Membrane?YesSemi-perm.Yes
Proteins?NoNoCarrier proteins
Key terms

Concentration gradient — difference in concentration between two areas.

Partially permeable — allows small molecules (water) through, not large ones.

Turgid — plant cell swollen with water.

Plasmolysed — plant cell that has lost so much water the membrane pulls away from the wall.

Question types
Multiple Choice Typed Answer
Multiple Choice
—
6 seconds per question
Score
Correct / Total
0 / 0
Accuracy
—
Session Streak
0

Diffusion: high → low concentration, no energy, any molecule.

Osmosis: water only, high → low water potential, through partially permeable membrane, no energy.

Active transport: low → high concentration, requires ATP energy and carrier proteins.