Chapter 12, Problem 26P

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.

a. lacO mutation in E. coli

b. ${\text{O}}_{\text{R1}}$ mutation in $\lambda$ phage

c. ${\text{O}}_{\text{R3}}$ mutation in $\lambda$ phage