Virus and bacteria Flashcards
1
Q
Viral replication
A
viral antigens detected by host receptors
virus moves into the host cell and protein coat disintegreates
reverse transcriptase copies viral RNA into DNA
DNA moves into nucleus and is integrated into DNA by integrase
Viral DNA is copied into mRNA and is translated to make proteins on ribosomes
Viral proteins are assembled into a new virus
Buds out of host cells
2
Q
Differences
A
Linear and circular DNA
RNA or RNA and DNA
3
Q
Why cant viruses replicate alone?
A
No rER, ribosomes, golgi
4
Q
Describe bacterial structure
A
Cell wall : peptidoglycan Cell membrane Ribosomes Capsule - protective mucus layer preventing dehydration and allows colonies to form Flagellum - cell movement Mesosome - infolding of membrane Circular DNA Plasmids - small circle of DNA Pili - protein tubes that allow bacteria to attach to surfaces 0.5-5um
5
Q
Describe viral structure
A
Small organic particle
Neither prokaryotic or eukarotic as they cannot divide of create proteins
DNA or RNA
