If a loss-of-function mutation occurs in one of the early genes in a lytic bacteriophage, which change is most likely to occur?
A) Late genes will be turned on.
B) The host genes will remain turned on.
C) The viral genome will be replicated.
D) New viral capsid proteins will be produced.
E) Proteins that lyse the host cell will be produced.

Question

Quizplus · Accepted Answer

If a loss-of-function mutation occurs in one of the early genes in a lytic bacteriophage, it is likely that the expression of host genes will not be inhibited. This is because early genes in lytic bacteriophages are responsible for hijacking host genetic machinery and downregulating host gene expression. If one of these early genes is impaired or deleted, it is unlikely that the viral genome will be replicated or late genes will be turned on, leading to viral progeny production. However, host gene expression will continue, and the bacteriophage may not lyse the host cell.

If a Loss-Of-Function Mutation Occurs in One of the Early