A bacterial culture is supplied continuously with glucose and oxygen in a vessel surrounded by a jacket of flowing water. The culture and the water entering the jacket start at the same temperature. The bacteria respire throughout, and no heater is used.
Which statement correctly predicts the net energy transfer caused by respiration in the bacteria?
Energy is transferred from the jacket water to the culture, because respiration needs an energy supply
Energy from glucose is all captured in ATP inside the bacteria, so the water leaving the jacket is not warmer
Energy is transferred from the culture to the jacket water, so the water leaving the jacket is warmer
No net energy is transferred, because the culture and the jacket water started at the same temperature
92 exam-style questions on AQA GCSE Biology 4.2 Respiration, covering 4.2.1 Aerobic and anaerobic respiration, 4.2.2 Response to exercise, and 4.2.3 Metabolism. Each one has a worked solution and a mark scheme showing where the marks go.