The table shows solute concentrations on either side of four identical membranes. Each membrane is permeable to the solute. Temperature is the same in each experiment.
Table
| Experiment | Left concentration in arbitrary units | Right concentration in arbitrary units |
|---|---|---|
| P | 12 | 8 |
| Q | 10 | 2 |
| R | 16 | 10 |
| S | 8 | 8 |
In which experiment is the initial net diffusion rate from left to right greatest?
experiment P
experiment R
experiment Q
experiment S
42 exam-style questions on Edexcel GCSE Biology 8.1 Exchange surfaces and diffusion, covering 8.1.1 Introduction to exchange and transport, 8.1.2 Alveoli adapted for gas exchange, 8.1.3 Factors affecting rate of diffusion, and 8.1.4 Rate of diffusion using Fick's law. Each one has a worked solution and a mark scheme showing where the marks go.