Biology · Oct / Nov 2020 · Paper 12 · Question 2

Which statements about diffusion are correct? 1 Molecules move at random. 2 Molecules move down a concentration gradient. 3 Molecules may move through a partially permeable membrane.

1. A1, 2 and 3
2. B1 and 2 only
3. C1 and 3 only
4. D2 and 3 only

As printed in the paper