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.
1 DNA is composed of a deoxynucleoside triphosphate with a base attached to it. 2  DNA is composed of a sugar-phosphate backbone with bases projecting toward the inside of the backbone. 3  DNA is composed of a sugar-phosphate backbone with bases projecting toward the outside of the backbone.