What this practice covers
These questions are drawn from past CIE 0654 Co-ordinated Sciences 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.
- Saying osmosis is the movement of sugar or solute molecules. It is water.
- Leaving "partially permeable" out of the definition of osmosis, or writing "cell wall" instead.
- Saying water moves from high concentration to low concentration without saying high concentration of what, which reverses the answer if the reader thinks of the solute.
- Dropping the word "net" from the definition of diffusion.
- Claiming particles stop moving once concentrations are equal.
- Saying active transport moves particles down a gradient.
- Forgetting to mention energy from respiration when defining active transport.
- Listing respiration as a process that uses energy.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Movement into and out of cells revision notes.