A limiting factor for viral infection of animals cells is
A) presence of specific receptor molecules on the host cell.
B) internal metabolic temperature of the host cell.
C) nutrition of the host cell.
D) stage of cell cycle of the host cell.
E) culture conditions of the host cell.

Question

Quizplus · Accepted Answer

Viruses can only infect cells with specific receptor molecules that enable the virus to enter the cell. Without the appropriate receptor on the cell surface, the virus cannot enter and infect the host cell. Other factors such as cell cycle stage, culture conditions, and nutrition may also affect viral infection, but the presence of specific receptor molecules is the most limiting factor. Internal metabolic temperature of the host cell is not relevant for viral infection.

A Limiting Factor for Viral Infection of Animals Cells Is