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Biology · Paper 2 · Foundation + Higher · B6

Genetic engineering

Key ideas1 of 3

Introduce a useful gene

Genetic engineering changes an organism's genetic material by introducing a gene from another organism to give a desired characteristic. A gene carries information that can be used to make a protein.

For example, a human insulin gene can be introduced into bacteria. The genetically engineered bacteria can then make human insulin, which is collected and purified for use as a medicine. In the overview, G is the introduced gene, B is the bacterial cell and P is the protein produced. Research also explores genetic engineering to treat inherited disorders.

A human insulin gene is transferred into bacteria, which produce insulin.

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Practice, downloads and sources

Daily 5 · Exam practice · Revision sheet ↓

Foundation + Higher · B6. Fourteen core lessons, followed by two labelled Higher Tier lessons.

AQA Combined Science Trilogy 8464 · 4.6.2.4. Original notes, questions and diagrams. Models are simplified; teaching data are illustrative.