A microbiologist examines a Bacillus cell from a compost sample.
Bacillus is a bacterium.
Four statements describe how genetic material is arranged in the cell.
Which statement is correct?
The main DNA forms a single loop that lies free in the cytoplasm.
All the DNA is carried in plasmids, with no main loop of DNA.
The cell contains no DNA because bacterial cells have no nucleus.
The main DNA forms a single loop that is enclosed in a nucleus.
282 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.