Final answer:
The proteins that aid DNA binding to the cell surface, uptake of DNA into the cytoplasm, and incorporation of foreign DNA into the bacterial chromosome are called factors.
Step-by-step explanation:
The proteins that aid DNA binding to the cell surface, uptake of DNA into the cytoplasm, and incorporation of foreign DNA into the bacterial chromosome are called factors. These factors are crucial for the process of genetic transfer in bacteria. For example, in conjugation, the proteins encoded by the F-plasmid genes enable the formation of the F pilus, which allows DNA transfer between bacteria.