A gene fragment has two different sticky ends. The table shows whether each vector has complementary ends and whether it can enter the intended recipient cell. No further cutting is carried out.
Table
| Vector | First end matches | Second end matches | Can enter recipient |
|---|---|---|---|
| P | yes | no | yes |
| Q | yes | yes | no |
| R | yes | yes | yes |
| S | no | yes | yes |
Which vector and enzyme combination is suitable for joining and delivering the complete gene?
R with restriction enzyme
Q with ligase
R with ligase
P with restriction enzyme
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.