Virus Flashcards
Are viruses living
Non-living
Do viruses have nudeic acid?
Yes, some have dna/rna
How do viruses protect themselves?
Protein coat for protection
How are viruses classified?
Nucleic acid makeup and shape of protein coat
Why are viruses seen as non-living?
They can only survive when attached to host cells without host cells they don’t have the mechanisms to survive
Can viruses attach onto any host, how can they tell?
No, only specific cells through the lock and key
What are the 3 things viruses must have?
① genetic information (dnaorrna)
② viral nucleic acid covers by capsid
③ envelope
What is a capsid?
A protein coat
What is the envelope of viruses?
A membrane allowing it to be absorbed
What are the 2 reproductive cycles of viruses?
Lyric and lysogenic
Explain the lytic cycle
Happens right away
The viral dna/rna is etheir inserted or engulfed
It deactivates the host mRNA and more viral copies are made
Cell is “lysed” breaks and spreads
Explain lysogenic cycle
Latent, only when conditions are right RNA's inserted into host RNA becomes a part of the DNA Of host This cell undergoes divisions When conditions are right the lytic cycle is-performed
What are the 2 ways viruses enter the cell?
① endocytosis (fully engulfed)
② injection( a viral DNA RNA is injuected)
How does DNA viruses reproduce genomes
DNA polymerase
How do must RNA viruses replicate genome
RNA polymerase
