1. A point mutation occurs. It may be either silent, nonsense or mis-sense. How many of the three will affect the primary structure of the resulting polypeptide?
1 of 20
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2. A complete gene, comprised of 37.5% introns, in a particular DNA section undergoes transcription, splicing then translation. The original DNA section was 1.728kBp long. What is the number of amino acids in the resulting polypeptide?
3. What does it mean to suffer from 'Type I' diabetes mellitus?
- Type I diabetics do not produce sufficient insulin, suspected to be due to an autoimmune response to pancreatic cells and must inject insulin to maintain their BGC.
- Type I diabetics have cells which are unresponsive to insulin (often due to obesity), and so must manage their carbohydrate intake to maintain their BGC
4. Normal blood glucose concentration (BGC) is:
- 10mg per 100cm^3 blood
- 90mg per 100cm^3 blood
- 100mg per 100cm^3 blood
- 9mg per 100cm^3 blood
5. If a  mutates it may become a  which stimulates , leading to uncontrolled cell division, or a 
- 1: proto-oncogene, 2: oncogene, 3: cell division, 4: tumour
- 1: tumor suppressor gene, 2: oncogene, 3: cell division, 4: tumour
- 1: oncogene, 2: excitatory oncogene, 3: autolysis, 4: tumour
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