A fermenter used to grow *Fusarium* has a cooling jacket.
Why must the fermenter be cooled?
Photosynthesis by the fungus transfers energy to the mixture as heat
Respiration by the fungus transfers energy to the mixture as heat
Warm mixtures hold more oxygen, so the fungus would grow too quickly
Stirring the mixture transfers energy that would denature the fungus
42 exam-style questions on AQA GCSE Biology 7.5 Food production, covering 7.5.1 Factors affecting food security, 7.5.2 Farming techniques, 7.5.3 Sustainable fisheries, and 7.5.4 Role of biotechnology. Each one has a worked solution and a mark scheme showing where the marks go.