Viruses require host cell's machinery to make copies of themselves. However, some viruses that infect humans require mechanisms that do not normally occur in human cells. Which of the following describes how the viruses can replicate in human cells?
A) The virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles.
B) The viral genome codes for specialized enzymes not found in the host cells.
C) The virus can enter these cells but new viruses will not be made until an environmental change triggers a switchover.
D) Viruses can stay in a quiescent state until the host cell evolves this ability.

Question

Quizplus · Accepted Answer

Viruses often carry genes that encode for specialized enzymes necessary for their replication, which are not naturally present in the host cells. These enzymes enable the virus to replicate by using the host's cellular machinery in ways that the host cell itself does not normally operate.

Viruses Require Host Cell's Machinery to Make Copies of Themselves