A computer simulation models plant cells in a vessel containing glucose but no oxygen. The cells use ATP for processes including active transport.
The table shows data from a 10-minute period.
| Quantity | Number of molecules |
|---|---|
| ATP present at the start | 30 |
| ATP used during the 10 minutes | 490 |
| ATP present at the end | 20 |
| Glucose supplied at the start | 300 |
The simulation uses a yield of two ATP molecules for each glucose molecule broken down. It also models the formation of 10 ethanol molecules for every five glucose molecules broken down.
Calculate the percentage of the supplied glucose that remains at the end of the 10 minutes and the number of ethanol molecules formed.
Show your working.
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.