Part D Drag and drop each base to match with its partner in order to maximize hydrogen bonding Thymine C-1' of C1C-1'of C-1 of C-1' of C1

Ans. The given structures are of nitrogenous bases that are present in DNA molecules, out of which, two are purine bases (adenine and guanine) and two are pyrimidine bases (thymine and cytosine). Thymine pairs with adenine by two hydrogen bonds beween 6-4 and 1-3 position. Cytosin pairs with guanine with three hydrogen bonds between 6-4, 1-3, and 2-2 position. These bondings are called Watson-Crick bonding.