Multiple Choice
Which of the following statements about lysogeny is true?
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17. Viruses
Viruses
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How does the nucleic acid of T-even bacteriophages enter the host cell?
A
The nucleic acid enters the host cell by fusion of the viral envelope with the host membrane.
B
The nucleic acid is injected into the host cell through the bacteriophage's tail.
C
The entire virus is engulfed by the host cell through endocytosis.
D
The nucleic acid diffuses through the cell membrane of the host.
Verified step by step guidance1
Understand the structure of T-even bacteriophages: These are a type of virus that infects bacteria, characterized by a head containing nucleic acid and a tail structure used for attachment and injection.
Recognize the mechanism of infection: T-even bacteriophages attach to the bacterial cell surface using their tail fibers, which recognize specific receptor sites on the host cell.
Identify the process of nucleic acid entry: Once attached, the bacteriophage uses its tail to penetrate the bacterial cell wall and membrane.
Explain the injection process: The bacteriophage contracts its tail sheath, acting like a syringe, to inject its nucleic acid directly into the host cell's cytoplasm.
Clarify the role of the host cell: The host cell's machinery is then hijacked by the viral nucleic acid to produce new viral particles, leading to the replication of the virus.
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