useful terminology

Question 1

lytic

Answer 1

the phage lifestyle that results in lysis of the bacterial cell upon release of progeny phage

a viral reproductive cycle where a virus hijacks a host cell to make copies of itself, causing the host cell to burst and release new viruses

Question 2

lysogenic

Answer 2

the page lifecycle that results in stable carriage of the phage (prophage) within the host cell (lysogen)

a viral reproduction cycle where a bacteriophage (a virus that infects bacteria) integrates its DNA into the host cell’s genome, becoming a prophage.

Question 3

virulent phage

Answer 3

a phage that is only able to undergo replication via the lytic cycle

Question 4

temperate phage

Answer 4

a phage that can replicate via etiher the lytic or lysogenic cycles (phage lambda)

Question 5

lysogen

Answer 5

host cell that is harbouring a prophage during lysogeny

Question 6

prophage

Answer 6

the latent form of a temperate phage that remains within the lysogen (eg integrated into host chromosome)

Question 7

operator

Answer 7

binding site for the repressor

binds regulatory proteins to alter transcription

Question 8

promotor

Answer 8

where RNA pol binds to start transcription

Question 9

negative regulation

Answer 9

gene expression is turned off by regulatory protein termed a repressor