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.
DNA is a nucleic acid. Its full name is deoxyribose nucleic acid. The function of DNA is to store genetic information that controls the production of proteins. Proteins form the structural building blocks and control all chemical processes in the cell.