Multiple Choice
Retroviruses are able to integrate their genome into the host cell?
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1. Overview of Cell Biology
Viruses
Multiple Choice
In the lytic cycle, what does a bacteriophage inject into a bacterial cell?
A
A complete, intact virion including the capsid
B
Its nucleic acid genome (typically DNA)
C
ATP to power viral replication
D
Ribosomes for viral protein synthesis
Verified step by step guidance1
Understand the structure of a bacteriophage: it consists of a protein coat called the capsid and the nucleic acid genome (DNA or RNA) inside it.
Recall the purpose of the lytic cycle: the bacteriophage infects a bacterial cell to replicate its genetic material and produce new virus particles.
Identify what is actually injected into the bacterial cell during infection: the bacteriophage does not inject the entire virion (capsid plus genome), but only the nucleic acid genome.
Recognize that the capsid remains outside the bacterial cell, attached to the surface, while the viral DNA enters the host to hijack the bacterial machinery.
Conclude that the bacteriophage injects its nucleic acid genome (typically DNA) into the bacterial cell to initiate the lytic cycle.
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