University of Central Florida (UCF) MCB2004C Microbiology for Health Professionals Practice Exam 4

The lytic cycle of a virus is characterized by a series of specific steps that lead to the destruction of the host cell and the release of new viral particles. The correct answer outlines these steps as attachment, penetration, biosynthesis, maturation, and release.

In the first step, attachment involves the virus binding to specific receptors on the surface of the host cell, facilitating the next phase. Once attached, penetration occurs, where the viral genetic material enters the host cell. This paves the way for the biosynthesis phase, in which the host cell's machinery is hijacked to replicate the viral genome and produce viral proteins.

Following the production of new viral components, maturation refers to the assembly of these components into complete virions. Finally, in the release step, the newly formed viral particles exit the host cell, often leading to cell lysis—where the cell breaks open, allowing the new viruses to infect neighboring cells.

The other options do not accurately depict the standard steps of the lytic cycle. Although they may include some relevant concepts, they mislabel or reorganize the critical phases that define this viral lifecycle, hence not representing the process accurately.