Two unlabelled records come from cell cultures that were supplied with glucose but no oxygen. Each culture contained either apple fruit cells or sheep cells.
| Record | Products formed |
|---|---|
| 1 | ethanol and carbon dioxide |
| 2 | lactic acid |
Which statement shows the likely source of each record?
record 1: apple fruit cells; record 2: apple fruit cells
record 1: sheep cells; record 2: sheep cells
record 1: apple fruit cells; record 2: sheep cells
record 1: sheep cells; record 2: apple fruit 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.