Multiple Choice
Which of these diseases does not have a human reservoir?
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17. Viruses
Viruses
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Which of the following statements about the T4 lytic life cycle is false?
A
The T4 phage injects its DNA into the host cell.
B
The host cell is lysed to release new phage particles.
C
The T4 phage integrates its DNA into the host genome.
D
The host cell's machinery is used to replicate the phage DNA.
Verified step by step guidance1
Understand the T4 lytic life cycle: The T4 phage is a type of bacteriophage that infects bacteria, specifically E. coli, and follows a lytic cycle.
Identify the key steps in the lytic cycle: The T4 phage attaches to the host cell, injects its DNA, uses the host's machinery to replicate its DNA, assembles new phage particles, and finally lyses the host cell to release new phages.
Analyze the given statements: Compare each statement with the known steps of the lytic cycle.
Evaluate the statement about DNA integration: In the lytic cycle, the phage DNA does not integrate into the host genome. Instead, it remains separate and is replicated independently.
Conclude which statement is false: The statement 'The T4 phage integrates its DNA into the host genome' is false because integration is characteristic of the lysogenic cycle, not the lytic cycle.
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