Viruses Flashcards
What is a virus?
Obligate intracellular parasite
What must viruses have?
A nucleic acid core and a protein shell
Must live inside a cell and harm the host
What are the steps of the Lytic Virus Lifecycle?
1) Attachment
2) Penetration
3) Biosynthesis
4) Maturation
5) Release
What is different between the Lytic virus lifecycle and the Lysogenic Virus lifecycle?
The virus lies dormant and allows the host cell to divide replicating the virus’s DNA along with the hosts
What is the viral DNA in the host called **?
Prophage
What are the 3 types of viruses?
DNA Viruses, RNA viruses, and retroviruses
What are the 2 types of RNA viruses?
positive virus-translates to a protein
negative virus-has RNA dependent RNA polymerase and has to make another complement to be able to code for a protein
What does Retroviruses contain?
RNA dependent DNA polymerase, which allows it to undergo Lysogenic cycle
A virus must have _______ to undergo the lysogenic cycle?
DNA
What is a bacteriophage?
A virus that attacks bacteria
What are the 4 types of herpes?
Oral, genital, chicken pox, and shingles
What is Rinovirus?
common cold
What is orthomyxovirus?
The flu
What is Ebola?
Causes hemorragic fever
As viruses evolve, they become less and less ________.
deadly
