12. Gene Regulation in Prokaryotes

In which of the following life cycles does a bacteriophage integrate itself into the host genome?

In good growth conditions the bacteriophage is more likely to enter into which life cycle?

Activation of which of the following genes leads to entrance into the lysogenic cycle?

The N protein is an anti-terminator. What does this mean?

Describe the difference between the bacteriophage lytic cycle and lysogenic cycle.

Describe the lytic and lysogenic life cycles of λ bacteriophage. What roles do λ repressor and Cro protein play in controlling transcription from P_R and P_RM, and how are these roles linked to lysis and lysogeny?

Suppose that base substitution mutations sufficient to eliminate the function of the operator regions listed below were to occur. For each case, describe how transcription or life cycle would be affected.

O_R1 mutation in λ phage

Suppose that base substitution mutations sufficient to eliminate the function of the operator regions listed below were to occur. For each case, describe how transcription or life cycle would be affected.

O_R3 mutation in λ phage