Rice plants grow with their roots in waterlogged soil. There is very little oxygen in waterlogged soil. The root cells of rice plants can survive high concentrations of ethanol. Which statement explains why this is an advantage to rice plants?
Ethanol is needed to make glucose in the cells of the roots.
Root cells respire anaerobically and produce ethanol as a product.
Ethanol is used by root cells to take in more oxygen from water.
Root cells respire aerobically and produce ethanol as a product.
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.