Cambridge IGCSE Biology, topic 21
Biotechnology and genetic modification
Biotechnology uses living organisms, such as bacteria and yeast, or substances from them, such as enzymes, to make useful products. This topic covers how yeast, enzymes and fermenters are used in industry, and how genetic modification changes the genes of an organism so that it makes a new product or gains a new feature. You also meet the advantages and disadvantages of genetically modified crops.
Revision notes
Worksheet
FlashcardsSubtopics
Work through them in order. Each one has notes, exam questions and flashcards, and a PDF of each.
- 1Biotechnology Spec 21.1, 21.2Why bacteria are useful, yeast for biofuels and bread, enzymes in industry, and fermenters for making insulin, penicillin and mycoprotein.NotesQuestions 8Flashcards 17
- 2Genetic modification Spec 21.3Genetic modification: what it is, examples, how bacteria are modified to make a human protein, and GM crops.NotesQuestions 6Flashcards 10
Whole topic
When you have done the subtopics: test yourself on everything, or print the lot.