DNA

1. N-UNCOUNT DNA is an acid in the chromosomes in the centre of the cells of living things. DNA determines the particular structure and functions of every cell and is responsible for characteristics being passed on from parents to their children. DNA is an abbreviation for "deoxyribonucleic acid." 脫氧核糖核酸

A routine DNA sample was taken. 采集了一份常規(guī)的脫氧核糖核酸樣本。