Which of the following is a characteristic of a satellite virus?

A satellite virus is characterized by its dependence on a helper virus for replication. Unlike typical viruses that can independently infect host cells, satellite viruses lack the necessary machinery to replicate their nucleic acids and rely on the presence of a helper virus for these processes. This relationship often enhances the infectivity of the satellite virus, as it typically exploits the biological mechanisms of the helper virus to complete its life cycle.

In contrast, the other characteristics mentioned are not applicable to satellite viruses. They do not possess their own nucleic acid replication machinery, meaning they cannot replicate on their own. Additionally, satellite viruses are usually smaller than standard viruses, which further distinguishes them from regular viral pathogens that are capable of independent infection and replication. Understanding satellite viruses highlights the complexity of viral interactions and the specialized roles some viruses play in the viral community.