Question 1
In λ phage, a mutation that inactivates which of the following genes should leave the mutated phage strain capable of establishing lysogeny?
◦
cI◦
cII◦
cro◦
int◦
NQuestion 2
In λ phage, which protein, the product of the
cI gene, blocks the transcription required to initiate the lytic cycle?
◦ cro
◦ repressor
◦ enhancer
◦ integrase
◦ operator