EVERYDAY SCIENCE

Detailed explanation-1: -Not all animal viruses undergo replication by the lytic cycle. There are viruses that are capable of remaining hidden or dormant inside the cell in a process called latency.

Detailed explanation-2: -A bacteriophage has both lytic and lysogenic cycles. In the lytic cycle, the phage replicates and lyses the host cell. In the lysogenic cycle, phage DNA is incorporated into the host genome, where it is passed on to subsequent generations.

Detailed explanation-3: -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-4: -In the lytic cycle, the virus attaches to the host cell and injects its DNA. Using the host’s cellular metabolism, the viral DNA begins to replicate and form proteins. Then fully formed viruses assemble. These viruses break, or lyse, the cell and spread to other cells to continue the cycle.

Detailed explanation-5: -The lysogenic cycle can take several decades to end. The lysogenic cycle is the form of viral replication in which a virus integrates its genome with the genome of its host to form a provirus. It can be contrasted with the lytic cycle in which the virus immediately kills the host.