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.
USB sticks are perfect promotional gifts. 1  A Branded USB stick is the most versatile and effective promotional giveaway around. USB flash drives endure as a logo branded gift because its spare memory space is useful and it can store your promotional material which you can lock to prevent it being removed.