A scientist compares two genetic engineering attempts. The same donor gene and recipient bacteria are used.
Table
| Attempt | Gene joined into vector before transfer | Gene detected inside bacteria after transfer |
|---|---|---|
| P | yes | no |
| Q | no | no |
Which conclusion is supported by both sets of results?
P failed at or before joining; Q failed only during delivery.
Both failed during delivery, because neither produced modified bacteria.
Both failed at gene cutting, because neither produced modified bacteria.
P failed to deliver the gene; Q failed at or before joining.
44 exam-style questions on Edexcel GCSE Biology 4.3 Selective breeding and genetic modification, covering 4.3.1 Selective breeding and its impact, 4.3.2 Tissue culture, 4.3.3 Genetic engineering overview, 4.3.4 Main stages of genetic engineering, 4.3.5 Advantages and disadvantages of GM organisms, 4.3.6 Agricultural solutions for a growing population, and 4.3.7 Evaluating genetic engineering and breeding. Each one has a worked solution and a mark scheme showing where the marks go.