Two samples of mushroom tissue each begin with 4.0 g of glucose. Oxygen is supplied to one sample, while the other sample is kept without oxygen.
At the end of the investigation, 1.0 g of glucose remains in the sample supplied with oxygen and 2.5 g remains in the sample without oxygen. The decrease in glucose mass is due only to respiration.
The total energy transferred by each sample is measured.
Which masses of glucose should be used to calculate the energy transferred per gram of glucose by each sample?
3.0 g for the sample with oxygen and 1.5 g for the sample without oxygen
4.0 g for the sample with oxygen and 4.0 g for the sample without oxygen
1.0 g for the sample with oxygen and 2.5 g for the sample without oxygen
1.5 g for the sample with oxygen and 3.0 g for the sample without oxygen
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.