Here's a summary of the statements you provided regarding the lytic and lysogenic cycles of viruses:
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The viral genome incorporates into the host genome during the lysogenic cycle.
- True. In the lysogenic cycle, the viral genome integrates into the host cell's genome and remains dormant as a prophage until it is activated.
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The viral genome is injected into the cell only during the lytic cycle.
- False. The viral genome is injected into the host cell at the beginning of both the lytic and lysogenic cycles.
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The lytic cycle involves the merging together of the viral and host genomes.
- False. In the lytic cycle, the viral genome takes over the host's machinery to replicate and assemble new virions, resulting in the cell's lysis and the release of new viruses. The host genome is not integrated or merged with the viral genome in this cycle.
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The lysogenic cycle involves newly replicated virus bursting from the cell.
- False. The lysogenic cycle involves the viral genome integrating into the host genome and remaining dormant. The host cell may replicate normally, passing the viral DNA to daughter cells. The virus can enter the lytic cycle later, at which point the cell would eventually burst releasing new viruses.
In conclusion, the true statement among those listed is that the viral genome incorporates into the host genome during the lysogenic cycle.
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