grin from ear to ear. to give a very big smile He was grinning from ear to ear, as if he had just won the lottery.
DNA or deoxyribonucleic acid is a long molecule that contains our unique genetic code. Like a recipe book it holds the instructions for making all the proteins in our bodies. DNA replication is the process by which DNA makes a copy of itself during cell division.
DNA is made up of chains of nucleotides, molecules made up from purine, pentose sugar, and a phosphate group, put onto a sugar and phosphate backbone and wrapped around each other; this is called a double helix. There are four bases in DNA; guanine, cytosine, adenine, and thymine.here are four bases that make up RNA just as DNA has. RNA's four bases consist of adenine, cytosine, guanine, and uracil. RNA is also what a mutagen looks for. If a mutagen takes over RNA it is able to change the DNA and make the cell do what the mutagen wants it to do rather then what it is supposed to do.