Cells from an onion bulb and cells from a fish muscle are each supplied with glucose. Neither sample receives oxygen. A technician tests the samples for ethanol, lactic acid, carbon dioxide and water.
Which result should the technician record?
Ethanol is formed only in the onion cells.
Carbon dioxide is formed only in the fish cells.
Lactic acid is formed only in the onion cells.
Water is formed only in the fish cells.
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.