During penetration of E. coli by the T4 phage,
A) lysozyme is used to allow entry of the phage capsid.
B) the tail acts as a "hypodermic needle," injecting the phage DNA into the cell.
C) the protein fibers digest a hole in the cell wall.
D) the bacterial receptor molecules open a hole through the cell wall.
E) the intact phage enters the host by endocytosis.

Question

During penetration of E. coli by the T4 phage,
A) lysozyme is used to allow entry of the phage capsid.
B) the tail acts as a "hypodermic needle," injecting the phage DNA into the cell.
C) the protein fibers digest a hole in the cell wall.
D) the bacterial receptor molecules open a hole through the cell wall.
E) the intact phage enters the host by endocytosis.

Quizplus · Accepted Answer

In the penetration stage of T4 phage infection, the tail acts as a "hypodermic needle," which penetrates the bacterial cell wall and membrane, injecting the phage DNA into the host cell. Lysozyme is not used in this stage, and neither the protein fibers nor the bacterial receptor molecules open a hole in the cell wall. Endocytosis does not occur during penetration of T4 phage into E. coli.

During Penetration of E