A culture of bacteria is supplied with glucose. The bacteria are dividing.
A student measures the energy transferred from the culture to the surroundings as heat. The student uses this measurement to estimate the total energy transferred by respiration.
Which statement explains why the estimate is too low?
Some energy is transferred from the surroundings into the bacteria during respiration, so it is not detected as heat leaving the culture
Cell division produces additional energy that is stored in glucose, so it is not detected as heat leaving the culture
Some energy transferred by respiration is used in cell division rather than being measured as heat transferred to the surroundings
Energy remaining in glucose that has not been broken down should be included in the total energy transferred by respiration
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.