BIOLOGICAL CLASSIFICATION
VIRUSES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A virus injects DNA into a host cell
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Bacteria injects genetic material into a host cell
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Bacteria injects DNA into a host cell
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A virus injects its genetic material into a host cell
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Detailed explanation-1: -The lysogenic cycle: The phage infects a bacterium and inserts its DNA into the bacterial chromosome, allowing the phage DNA (now called a prophage) to be copied and passed on along with the cell’s own DNA.
Detailed explanation-2: -During the lysogenic cycle, the virus genome is reversibly integrated into the host chromosomes or replicates as a plasmid (or episome) in such a way that it does not lead to virus progeny production.
Detailed explanation-3: -Like the lytic cycle, in the lysogenic cycle the virus attaches to the host cell and injects its DNA. From there, the viral DNA gets incorporated into the host’s DNA and the host’s cells.
Detailed explanation-4: -During the lysogenic cycle, instead of killing the host, the phage genome integrates into the bacterial chromosome and becomes part of the host. The integrated phage genome is called a prophage. A bacterial host with a prophage is called a lysogen.
Detailed explanation-5: -Lysogenic cycle Following the injection of the phage DNA into the host cell, it integrates itself into the host genome, with the help of phage-encoded integrases, where it is then termed a prophage.