In the bacteriophage $\lambda$,the mutants cI,cII,and cIII form:
A)form turbid plaques and are able to establish lysogeny.
B)form clear plaques and are unable to establish lysogeny.
C)form turbid plaques and are unable to establish lysogeny.
D)form clear plaques and are able to establish lysogeny.
E)form both clear and turbid plaques.

Question

Quizplus · Accepted Answer

The mutants cI, cII, and cIII are all involved in the lysogenic cycle of bacteriophage F1F1F1S1F1F1F10. Mutant cI is unable to repress transcription of the lytic genes and therefore favors lysis of the host cell. Mutant cII is involved in activation of the transcription of cIII and other lysogenic genes while mutant cIII is required for efficient lysogeny establishment. The fact that these mutants form clear plaques indicates that they are unable to establish lysogeny. Therefore, the best choice is B, which states that the mutants form clear plaques and are unable to establish lysogeny.

In the Bacteriophage λ\lambdaλ ,The Mutants CI,cII,and CIII Form: A)form Turbid Plaques and Are

In the Bacteriophage $\lambda$ ,The Mutants CI,cII,and CIII Form:
A)form Turbid Plaques and Are