Multiple Choice
What happens to the host bacterium's DNA after a bacteriophage injects its DNA/RNA into the cell?
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17. Viruses
Viruses
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Which of the following is characteristic of the lytic cycle in viruses?
A
The host cell is lysed, releasing new viral particles.
B
The virus replicates only when the host cell divides.
C
Viral DNA integrates into the host genome and remains dormant.
D
The host cell survives and continues normal function after infection.
Verified step by step guidance1
Understand the lytic cycle: The lytic cycle is one of the two main viral replication cycles. In this cycle, the virus infects a host cell, replicates its genetic material, and produces new viral particles, ultimately leading to the destruction (lysis) of the host cell.
Compare the lytic cycle to the lysogenic cycle: The lysogenic cycle involves the integration of viral DNA into the host genome, where it remains dormant and replicates along with the host cell's DNA. This is different from the lytic cycle, where the virus actively replicates and destroys the host cell.
Identify the key characteristic of the lytic cycle: The defining feature of the lytic cycle is the lysis of the host cell, which releases newly formed viral particles into the surrounding environment.
Evaluate the options provided: Look for the option that describes the destruction of the host cell and the release of viral particles, as this is characteristic of the lytic cycle.
Select the correct answer: The correct answer is the option stating 'The host cell is lysed, releasing new viral particles,' as this aligns with the defining feature of the lytic cycle.
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