Question

Differentiate between the lysogenic and lytic cycles.(1 point)
Responses

The virus injects DNA into the host cell during the lysogenic cycle.
The virus injects DNA into the host cell during the lysogenic cycle.

The host cell is destroyed during the lytic cycle.
The host cell is destroyed during the lytic cycle.

Viral proteins are synthesized during the lysogenic cycle.
Viral proteins are synthesized during the lysogenic cycle.

The host cell copies its own DNA during the lytic cycle.

Answer 1

Correct choice: "The host cell is destroyed during the lytic cycle."

Brief explanation:
- Lytic cycle: viral DNA replicates, viral proteins are made, new virions assemble and the host cell is lysed (destroyed).
- Lysogenic cycle: viral DNA integrates into the host genome as a prophage and is replicated passively with the host during cell division; the host is not destroyed and viral proteins are generally not produced unless the prophage is induced to enter the lytic cycle.

Notes on the other statements:
- Injection of DNA happens at infection for both cycles (not unique to lysogenic).
- Viral proteins are synthesized in the lytic cycle, not the lysogenic.
- The host copying its own DNA is not a defining feature of the lytic cycle; in lysogeny the host (and the integrated viral DNA) is replicated during normal cell division.