Question

For decades, biologists have debated whether viruses should be classified as living organisms. Traditional criteria for life require that an entity possess cellular structure, maintain homeostasis, carry out metabolic processes independently, and reproduce autonomously. Under this classical framework, viruses are unequivocally non-living. They are essentially genetic material encased in a protein coat, entirely devoid of cellular machinery. They cannot metabolize nutrients or generate energy, and they remain inert outside of a host cell. However, the discovery of giant viruses, such as Mimivirus and Megavirus, has prompted a reevaluation of this strict boundary. These giant viruses possess genomes larger than those of many parasitic bacteria and contain genes previously thought to be exclusive to cellular life, including those involved in nucleotide synthesis and protein translation. Furthermore, some researchers argue that the 'virus factory'—the complex structure a virus forms inside a host cell to orchestrate its replication—represents a transient living state. While traditionalists maintain that dependence on a host's ribosomes disqualifies viruses from biological classification as life, proponents of the viral domain argue that obligate intracellular parasites, like certain bacteria, also rely entirely on host machinery yet are uncontroversially considered alive.

Based on the passage, the traditional framework for biological life requires an entity to possess all of the following EXCEPT: