What is a plasmid?
Some bacteria carry a plasmid that contains a gene for resistance to an antibiotic.
Bacteria can pass plasmids to other bacteria.
Explain why this makes an infection caused by these bacteria harder to treat.
139 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.