Three cell samples are supplied with glucose. The table shows their respiration products.
Table
| Sample | Products detected |
|---|---|
| P | carbon dioxide and water |
| Q | lactic acid |
| R | ethanol and carbon dioxide |
Each sample uses only one respiration pathway.
Which statement correctly identifies the pathways?
P uses oxygen; Q and R break down glucose incompletely
P uses oxygen; Q and R break down glucose completely
R uses oxygen; P and Q break down glucose completely
Q uses oxygen; P and R break down glucose incompletely
98 exam-style questions on Edexcel GCSE Biology 8.3 Respiration, covering 8.3.1 Aerobic and anaerobic respiration. Each one has a worked solution and a mark scheme showing where the marks go.