Picaridin can be used on human skin or clothing to repel mosquitoes, biting flies, ticks, fleas, and chiggers. These products may be pump sprays, liquids, aerosols, or wipes.
Transcription is carried out by a DNA-dependent RNA polymerase that copies the sequence of a DNA strand into RNA. To begin transcribing a gene, the RNA polymerase binds to a sequence of DNA called a promoter and separates the DNA strands.
DNA directs the synthesis of RNA under a chemical process known as transcription. Basically, what happens, is that cellular enzymes are directed by the genetic code itself to recreate strands of RNA in relation to the coded sequences stored in the DNA itself.