CPX079: 0.1 inch (2.54 mm) pitch polarizing key. Insert used to block hole of header connector, for correct connection / orientation to motherboard pin-outs.
The function of DNA in a cell is to code the way proteins turn genes on or off. the function of DNA is to make the proteins. DNA is the foundation of life. It's a complex molecule made up of four types of bases, cross connected like a staircase, and twisted into a spiral.
The function of RNA is to translate the genetic material stored in DNA, into protein structures. RNA essentially carries out the instructions of DNA. DNA is a type of complex acid, called a nucleic acid, made of a repeating pattern of simple building blocks called nucleotides.