The nucleus contains chromosomes, made up of genes, which are made up of a chemical called DNA (Deoxyribonucleic acid).
DNA contains instructions for making a cell and telling it what to do.
These instructions are called the genetic code.
Gene - Length of protein which gives instructions for making a certain protein
enzymes are a group of protein which control all chemical reactions in cells.
a DNA molecule is shaped like a twisted ladder (a double helix)
The sides are made of…