The table below shows the concentration of carbon dioxide in arbitrary units (a.u.\text{a.u.}a.u.) in the intercellular air spaces (outside) and inside four different plant mesophyll cells, P, Q, R, and S.
| Cell | Carbon dioxide concentration outside (a.u.\text{a.u.}a.u.) | Carbon dioxide concentration inside (a.u.\text{a.u.}a.u.) |
|---|---|---|
| P | 8 | 17 |
| Q | 19 | 12 |
| R | 11 | 12 |
| S | 22 | 11 |
Based on the table, answer the following questions:
Which cell has the smallest difference in carbon dioxide concentration between the outside and the inside of the cell?
Into which cell will carbon dioxide diffuse into the fastest?
30 exam-style questions on AQA GCSE Biology 1.3 Transport in cells, covering 1.3.1 Diffusion, 1.3.2 Osmosis, and 1.3.3 Active transport. Each one has a worked solution and a mark scheme showing where the marks go.