Summary
Summary Viral structure and reproduction
- Module
- Unit 2 - Cells
- Institution
- AQA
Year 1 Biology AQA A level notes. Achieved an A* in my final exam using these notes. They are based on the mark scheme requirements.
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Viral structure and reproduction10 October 2022 10:40
Structure of a virus
- Acellular (particles), non-living
- 20-300nm in size
- Nucleic acids such as DNA or RNA are genetic material - enclosed within a protein coat
capsid
- Some viruses have a lipid envelope
- Lipid envelope or capsid have attachment proteins which allow the viruses to attach to
- No plasma membrane, cytoplasm, ribosomes
Ie bacteriophage (virus that only infects bacteria) structure:
- Mutations more likely in viruses who have RNA than DNA
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