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.
This type of RNA is called ribosomal RNA, or rRNA. Remember that DNA and RNA differ slightly at the nucleotide level. Therefore, the process of transcribing DNA into RNA not only changes the information from a double-stranded into a single-stranded molecule, but also changes all the thymine bases into uracil ones.his type of RNA is called ribosomal RNA, or rRNA. Remember that DNA and RNA differ slightly at the nucleotide level. Therefore, the process of transcribing DNA into RNA not only changes the information from a double-stranded into a single-stranded molecule, but also changes all the thymine bases into uracil ones.