This statement is true. DNA (deoxyribonucleic acid) contains the nitrogenous base thymine, whereas RNA (ribonucleic acid) does not.
In DNA, there are four nitrogenous bases: adenine (A), thymine (T), cytosine (C), and guanine (G). Thymine pairs with adenine during the formation of the double helix structure of DNA.
On the other hand, RNA contains uracil (U) in place of thymine. The four bases in RNA are adenine (A), uracil (U), cytosine (C), and guanine (G). This difference is significant for various cellular processes, including protein synthesis.
So, to sum it up, DNA contains thymine, while RNA has uracil, making the statement correct.