Answer:
The structure that is present in bacteria, but not in viruses, is the cell membrane.
Explanation:
The cell membrane or cytoplasmic membrane, is a structure of the cells of living organisms -like bacteria- formed by a double layer of lipids, glycoproteins, and structural proteins.
Viruses are not considered living organisms, since they lack the structure and function of a cell. Viruses consist of genetic material -DNA or RNA- covered by a viral capsid, which in turn can be covered by an envelope containing glycoproteins on its surface.
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