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M2 basic virus_hg
- 1. Viruses
- 2. What is a virus? ‘Infectious particle’ Genetic material Protein coat
- 3. Properties of a virus • A virus is a very small, infectious, obligate intracellular parasite • Virus particles are not living • Viruses are chemicals, and by themselves cannot reproduce • A susceptible and permissive cellular host is needed for viruses to reproduce • All viruses must make mRNA that can be translated by host ribosomes
- 6. DNA RNA OR + Basic virus structure DNA RNA OR +
- 7. DNA RNA OR + Capsid Protein Basic virus structure DNA RNA OR + Capsid Protein
- 8. DNA RNA OR + Capsid Protein Basic virus structure DNA RNA OR + Capsid Protein
- 9. Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA OR + Capsid Protein
- 13. Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein = + Lipid membrane Glycoproteins
- 14. Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein = + Lipid membrane Glycoproteins Enveloped virus
- 16. Attachment
- 17. Attachment: tropism Lock and key
- 18. Penetration
- 19. Disassembly
- 26. Release
- 27. Retroviruses
- 28. Outcome of cellular infection
- 29. Immune response • Cell mediated immunity – Important in the recovery from viral illness • Antibodies – Important in the protection from repeat exposure