Chapter 12, Problem 13P

Describe the lytic and lysogenic life cycles of $\text{λ}$ bacteriophage. What roles do $\text{λ}$ repressor and Cro protein play in controlling transcription from ${\text{P}}_{\text{R}}$ and ${\text{P}}_{\text{RM}}$, and how are these roles linked to lysis and lysogeny?