You are attempting to mutate lambda to affect whether lysis or lysogeny occurs after infection. Which mutation would INCREASE the chances of LYSOGENY over lysis?
A) deletion or inactivation of the cI gene
B) deletion or inactivation of the cro gene
C) overexpression of the cro gene
D) deletion of both the cro and cI genes

Question

Quizplus · Accepted Answer

The cI gene encodes the lambda repressor, which promotes lysogeny by repressing the expression of genes necessary for the lytic cycle. Deleting or inactivating the cro gene, which encodes a protein that promotes lysis by repressing the expression of the cI gene, would decrease the lytic pathway's activity and increase the chances of lysogeny.

You Are Attempting to Mutate Lambda to Affect Whether Lysis