Describe the stages that are used to genetically modify a bacterium so that it is able to manufacture human growth hormone.
Growth hormone is a peptide hormone that stimulates growth, cell reproduction, and cell regeneration in humans.
Explain what is meant by the term hormone.
Traditional agriculture often uses selective breeding rather than genetic modification to improve livestock traits. Describe how selective breeding could be used to produce a herder of dairy cows with a high milk yield.
30 exam-style questions on Edexcel IGCSE Biology Genetic modification (genetic engineering). Each one has a worked solution and a mark scheme showing where the marks go.