Biology Cell Biology Practice Exam Questions
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| Question | Answer | Extra information |
| 1 |  [2 marks] | |
| 2 | mitosis [1 mark] | |
| 3 | electron (microscope) [1 mark] | |
| 4 | higher magnification [1 mark] | |
| 5 | 45 (mm)[1 mark] 45 / 250 or 0.18 (mm) [1 mark] 180 (μm) [1 mark] | allow ecf allow 180 (μm) with no working shown for 3 marks |
| 6 | 0.2 μm [1 mark] | |
| 7 | C [1 mark] | |
| 8 | cytoplasm and cell membrane dividing [1 mark] to form two identical daughter cells [1 mark] | accept cytokinesis for 1 mark |
| 9 | stage 4 [1 mark] only one cell seen this stage [1 mark] | |
| 10 | (4/36) x 16 x 60 [1 mark] 107 / 106.7 [1 mark] 110 (minutes) [1 mark] | allow 110 (minutes) with no working shown for 3 marks |
| 11 | binary fission [1 mark] | do not accept mitosis |
| 12 | shortage of nutrients / oxygen [1 mark] so cells die or death rate = rate of cell division [1 mark] | |
| 13 | nucleus [1 mark] | |
| 14 | gene(s) [1 mark] | allow allele(s) |
| 15 | copying of chromosomes [1 mark] | |
| 16 | mitochondria [1 mark] | |
| 17 | 60-45 or 120-105 [1 mark] 15 (minutes) [1 mark] | an answer of 15 (minutes) scores 2 marks |
| 18 | C [1 mark] | |
| 19 | 8 [1 mark] | |
| 20 | to repair tissues [1 mark] | |
| 21 |  [2 marks] | additional line from a level of organisation negates the mark for that level of organisation |
| 22 | palisade mesophyll [1 mark] | |
| 23 | 50/8 [1 mark] 6 / 6.25 / 6.3 (micrometres) [1 mark] | an answer of 6 / 6.25 / 6.3 scores 2 marks |
| 24 | differentiation [1 mark] | |
| 25 | diffusion [1 mark] | |
| 26 | A [1 mark] | |
| 27 | B [1 mark] | |
| 28 | (earthworm) can absorb more oxygen (in a given time) or increases / more gas exchange [1 mark] | allow get / obtain / take in more oxygen ignore easier absorption of oxygen ignore references to food |
