BIOLOGY
VIRUSES
, VIRUSES
WHAT ARE VIRUSES
- Acellular pathogens
- Non living:
Cannot carry out life processes without a host.
Cannot multiply without a host cell.
- Naturally causes diseases
- Can be crystalized and stored
GENERAL STRUCTURE OF VIRUSES
OUTER PROTEIN COAT
- called: Capsid, is made of protein
sub-units called capsomeres
- the capsid surrounds the centre of
the virion (dormant virus, not in
contact with host cell).
OUTER LAYERS INNER CORE
- envelope (some viruses), surrounds - Contains nucleic Acid.
nucleocapsid. Made up of a lipid DNA: bacteriophage and animal
bi-layer that contains proteins. Part viruses
of cell membrane of host cell (trick RNA: plant viruses.
the immune system)
- Contains viral spikes - glycoprotein
spikes. Helps virus attach to host.
VIRUSES
, VIRUSES
WHAT ARE VIRUSES
- Acellular pathogens
- Non living:
Cannot carry out life processes without a host.
Cannot multiply without a host cell.
- Naturally causes diseases
- Can be crystalized and stored
GENERAL STRUCTURE OF VIRUSES
OUTER PROTEIN COAT
- called: Capsid, is made of protein
sub-units called capsomeres
- the capsid surrounds the centre of
the virion (dormant virus, not in
contact with host cell).
OUTER LAYERS INNER CORE
- envelope (some viruses), surrounds - Contains nucleic Acid.
nucleocapsid. Made up of a lipid DNA: bacteriophage and animal
bi-layer that contains proteins. Part viruses
of cell membrane of host cell (trick RNA: plant viruses.
the immune system)
- Contains viral spikes - glycoprotein
spikes. Helps virus attach to host.
