| Date | November 2011 | Marks available | 2 | Reference code | 11N.3.SL.TZ0.17 |
| Level | Standard level | Paper | Paper 3 | Time zone | TZ0 |
| Command term | Outline | Question number | 17 | Adapted from | N/A |
Question
Outline the use of viral vectors in gene therapy.
Markscheme
viral vector used to replace defective gene in somatic cell;
virus genetically engineered to carry normal copy of gene;
normal gene expressed in body cells;
valid example; (e.g. used to treat severe combined immune deficiency disease (SCID));
Examiners report
Again, very few gave clear answers on the use of viral vectors in gene therapy. Some received a mark for indicating a valid example such as SCID.
Syllabus sections
Option B: Biotechnology and bioinformatics » Option B: Biotechnology and bioinformatics (Additional higher level topics) » B.4 Medicine
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