A sample of apple tissue is kept in a chamber from which all oxygen has been removed. The cells continue to break down glucose and supply a small amount of ATP. Which statement explains what is happening in the apple cells?
The cells use anaerobic respiration and break glucose down incompletely into ethanol and carbon dioxide.
The cells use aerobic respiration and break glucose down completely into carbon dioxide and water.
The cells use anaerobic respiration and break glucose down completely into carbon dioxide and water.
The cells use anaerobic respiration and break glucose down incompletely into ethanol and water.
113 exam-style questions on OCR GCSE Biology 1.3 Respiration, covering 1.3.1 Cellular respiration supplies ATP, 1.3.2 Aerobic and anaerobic respiration, 1.3.3 Sugars and carbohydrates, 1.3.4 Amino acids and proteins, and 1.3.5 Fatty acids and lipids. Each one has a worked solution and a mark scheme showing where the marks go.