Viruses Flashcards
1
Q
What are the two types of viruses?
A
enveloped and non-enveloped
2
Q
What are the 5 stages in the viral life cycle?
A
- Attachment
- Entry
- Uncoating
- Replication
- Release
3
Q
Viral attachment
A
specific binding between viral surface proteins and their receptors
4
Q
Viruses can enter hosts via _______, _____, or other mechanisms
A
receptor mediated endocytosis, membrane fusion
5
Q
Viral coating
A
Viral capsid changes conf or is degraded by viral or host enzymes (pH changes)
6
Q
two ways of viral release
A
Non-cytolytic - release of virus by budding or exocytosis. Cell stays intact
Cytolytic - release of virus by cell lysis
7
Q
Why are viruses harmful
A
cytotoxic
Viral proteins are toxic
Immune system kills infected cells
8
Q
Viruses as tools
A
Amazon prime of genetic info - designed to deliver genetic material to cells
