The statements describe some of the steps in genetic engineering. 1 Ligase joins the gene into the plasmid. 2 Restriction enzymes cut the gene out of the donor DNA. 3 The bacteria are grown on agar containing an antibiotic. 4 The plasmid is inserted into the host bacteria. What is the correct order of the steps?
2, 4, 1, 3
1, 2, 4, 3
2, 1, 4, 3
2, 1, 3, 4
127 exam-style questions on OCR GCSE Biology 6.2 Feeding the human race, covering 6.2.1 Biological factors affecting food security, 6.2.2 Agricultural solutions to growing demand, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, 6.2.5 Steps in genetic engineering, 6.2.6 Benefits and risks of gene technology in agriculture, and 6.2.7 Biotechnological solutions to growing demand. Each one has a worked solution and a mark scheme showing where the marks go.