The genetic switch for the infection pathways of lambda phage is controlled by two regulatory proteins: ________ and ________.

Question

Quizplus · Accepted Answer

The lambda phage infection pathways are regulated by two regulatory proteins, lambda repressor and Cro. Lambda repressor controls the lysogenic pathway, where the phage genome integrates into the host genome and remains dormant. Cro, on the other hand, promotes the lytic pathway where the phage genome replicates and causes cell lysis. Thus, option A (lambda repressor and Cro) is the correct answer. The other options are not involved in regulating the lambda phage infection pathways.

The Genetic Switch for the Infection Pathways of Lambda Phage