Steroid hormones pass through the cell membrane and bind to a specific steroid hormone receptor protein. The combined steroid and receptor protein then bind to a specifiâ¦c sequence of bases in the DNA molecule. This sequence of bases is part of the promotor of a gene.   Binding of the steroid - receptor complex either activates (switches on) or represses (switches off) the gene which is controlled by that promotor.
A port replicator is an attachment for a notebook computer that allows a number of devices such as a printer, large monitor, and keyboard to be simultaneously connected.
The USB logo was modeled to resemble the Dreizack (Neptune's Trident) but with different shapes representing all sorts of devices that can be joined together. The designer basically saw that the icon had three triangles at the top, so he turned it into a triangle, a square, and a circle..