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.
You should now know that DNA ligase is an enzyme that functions during DNA replication and DNA repair. It functions by filling in the gaps in DNA that are created when DNA is synthesized. It uses the template strand in order to know which DNA nucleotides to fill in on the DNA strand.