What this practice covers
These questions are drawn from past CIE 9700 Biology papers and filtered to movement into and out of cells. You answer, you find out immediately whether you were right, and you get the reasoning for the correct option and for each distractor. Wrong answers go to a mistakes locker so you can come back to exactly those.
Practice is free. You need an account only so your progress and your mistakes are still there next time.
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What examiners see students get wrong here
These are the errors that cost marks on movement into and out of cells, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- Defining osmosis as movement "from high to low concentration of water". Use water potential.
- Getting the sign wrong. −200 kPa is higher than −800 kPa.
- Saying a plant cell bursts in pure water. The wall prevents it.
- Saying facilitated diffusion needs ATP. It does not; only active transport does.
- Saying a large organism has a large surface area so diffusion is fine. It is the ratio that matters, and it falls with size.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Movement into and out of cells revision notes.