Differentiate between the lysogenic and lytic cycles.(1 point) Responses The host cell is destroyed during the lytic cycle. The host cell is destroyed during the lytic cycle. 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 copies its own DNA during the lytic cycle. The host cell copies its own DNA during the lytic cycle. Viral proteins are synthesized during the lysogenic cycle.
The host cell is destroyed during the lytic cycle.
The virus injects DNA into the host cell during the lysogenic cycle.
The host cell copies its own DNA during the lytic cycle.
Viral proteins are synthesized during the lytic cycle.
just 1 answer
The virus injects DNA into the host cell during the lysogenic cycle.
The difference between the lysogenic and lytic cycles lies in the outcome for the host cell and the replication of viral genetic material.
1. Lytic cycle: In the lytic cycle, the virus enters the host cell and immediately takes over the cell's machinery to replicate its own genetic material and produce viral proteins. The host cell's DNA is not involved in this process. As the viral progeny increase in number, they eventually cause the host cell to burst (lyse), releasing the newly formed viruses into the surrounding environment. The host cell is destroyed in this cycle.
2. Lysogenic cycle: In the lysogenic cycle, the virus injects its DNA into the host cell, but instead of immediately initiating replication, the viral DNA integrates into the host cell's genome. This integrated viral DNA is called a prophage. The host cell then continues to divide and replicate its own DNA along with the integrated viral DNA. The viral genetic material is said to be dormant during this phase. In some cases, the lysogenic cycle can persist for a long time, with the viral DNA being passed on to daughter cells during cell division. At some point, conditions may favor the activation of the prophage, triggering the transition to the lytic cycle. Once activated, the prophage replicates, produces viral proteins, and eventually leads to the lysis of the host cell.
To summarize:
- Lytic cycle: Host cell destruction, immediate viral replication, and release of newly formed viruses.
- Lysogenic cycle: Integration of viral DNA into the host cell genome, replication of both host and viral DNA, and possible reactivation leading to the lytic cycle.