Barley embryos are placed in two sealed chambers. Oxygen is supplied to chamber T, while chamber U contains no oxygen. Over one hour, the cells in each chamber break down the same mass of glucose.
Which comparison is correct?
The products from T retain more chemical energy because glucose is broken down completely
The products from U retain less chemical energy because oxygen is absent
The products from U retain more chemical energy because glucose is broken down incompletely
The products from T and U retain equal chemical energy because equal masses of glucose are used
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.