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.
HP 3005pr USB 3.0 Port Replicator While it calls itself a port replicator, the HP 3005pr USB 3.0 Port Replicator (Price, $149 direct, check Amazon price) has the features of a full-fledged docking station. In addition to a pair of USB 3.0 ports, the device has four USB 2.0 ports.