The answer is nitrogenous base, deoxyribose sugar. The nitrogenous base bond complementarily; purines (Adenine and Guanine) pair with pyrimidines (Cytosine and Thymine). The deoxyribose sugar are 5-carbon rings that are connected to a phosphate molecule on their 5’ carbon. The nitrogenous base connect to the sugar on their 1’ carbon.