Salt has a molar mass of 58.44 g/mol, glucose of 180.15 g/mol. 50 grams of glucose results in 278 millimoles of glucose. 9 g of sodium chloride correspond to 154 millimoles of sodium chloride. The osmolarity of the solution of sodium chloride, however, is 308 milliosmoles / liter.
In the natural world DNA usually becomes available by death and lysis of other cells, but in the laboratory it is provided by the researcher, often as a genetically engineered fragment or plasmid. During uptake, DNA is transported across the cell membrane(s) , and the cell wall if one is present.
A plasmid is small, circular, extra-chromosomal, DNA. The ability of a virus to package its DNA (or RNA) into a protein capsid would be a feature that no plasmid shares; in other words, plasmid DNA outside the cell would be naked. Unlike viruses, plasmids don't kill the host cell after they. have replicated.