Lecture 21: Viruses and temperate bacteriophage Flashcards
are viruses living?
no
what is generated when reverse transcriptase is used on RNA?
double stranded DNA
what is the baltimore method?
the mode of replication and genome type of 7 group classes of genetic information?
what is class I of the baltimore method?
double stranded DNA is transcribed to mRNA
what is class II of the baltimore method?
single stranded DNA is duplicated into double stranded DNA then transcribed into mRNA
what is class III of the baltimore method?
double stranded RNA is transcribed into mRNA
what is class IV of the baltimore method?
+ single stranded RNA is converted to - single stranded RNA then transcribed into mRNA
what is class V of the baltimore method?
- single stranded RNA is transcribed into mRNA
what is class VI of the baltimore method?
single stranded RNA is reverse transcripted into DNA/RNA which is duplicated into double stranded DNA which is transcribed into mRNA
what is class VII of the baltimore method?
double stranded DNA (previously reverse transcripted) is transcribed into mRNA
what are the 2 components of a naked virus?
nucleic acid and capsid (nucleocapsid)
what additional features does an enveloped virus have?
lipid envelope with surface proteins
what are capsids made from?
capsomers
what is a virus of a virus called?
virophage
what is an example of a bacteriophage with a temperate lifestyle?
bacteriophage lambda
what is it called when a bacteriophage integrates its own DNA into the hosts’?
prophage
what is the temperate lifestyle also known as?
lysogenic pathway
what gene codes for a lysogenic pathway?
cl
what gene codes for a lytic pathway?
cro
