The surface it is standing on would be, I assume, the interior of the exterior of a bacterium, being that bacteriophage viruses invade and then replicate within bacteria, taking proteins from the bacteria to create copies of itself. Sounds creepy, though the influenza virus does the exact same thing, using our cells instead of a single cell bacterium. From a virus’s unthinking and barely even alive POV, a cell is a cell. What matters is the proteins in the cell, without which there can be no baby viruses.
Brick's Science 
You screwed up. First off there are different viruses for different cells. Each viruses has a protein on its surface that will.only lock on a certain cells membrane
So a bacteiophage could not invade s human cell or even a different bacteria’s cell. They are very specific. Secondly, viruses do not use the cell’s proteins to reproduce. Instead, the virus injects its DNA into a cell. The cell reads the DNA and makes new viruses. DNA is not a protein. It is a nucleic acid ( deoxyribonucleic acid). The new viruses cause the cell to burst (or lyse) and then they float around looking for something else to invade. I don’t think that viruses even eat. Viruses are the ultimate freelancers.
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I don’t think I said a bacteriophage invades human cells.
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