First, enzymes read the information in a DNA molecule and transcribe it into an intermediary molecule called messenger ribonucleic acid, or mRNA. Next, the information contained in the mRNA molecule is translated into the "language" of amino acids, which are the building blocks of proteins
DNA starts off on the nucleus where it then gets separated into DRNA so that it can travel to other parts of the cell. It is the. Carried by vehicle to the rough ER where ribosomes are added to it then it goes to the smooth ER where waste is expelled. Finally, it goes to the Golgi apparatus where it is either stored or carried to a part of the cell.
The blood sample only contains B as a surface antigen (simplified as the sugars clinging to the blood embedded halfway inside) making any other blood type unviable. B would be the only option.