Ace AQA AS Biology 2025 – Dive In and Discover Your Inner Biologist!

Question: 1 / 400

Which statement about osmosis is true?

It occurs only in plants

It involves the movement of solutes

It moves water from high to low solute concentration

Osmosis refers specifically to the movement of water molecules across a selectively permeable membrane, and it occurs in response to differences in solute concentration. In osmosis, water moves from an area of low solute concentration (where there are fewer solutes and more water) to an area of high solute concentration (where there are more solutes and less water). This process continues until equilibrium is reached, where the concentration of solutes is balanced on both sides of the membrane.

The understanding of osmosis is essential in biological contexts, especially concerning cell physiology, where it plays a critical role in maintaining cell turgor in plants and proper hydration levels in animal cells. The assertion that water moves from high to low solute concentration accurately captures the essence of osmosis and its foundational principle in biological systems.

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It requires energy input

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