Can you identify the components of a DNA strand? Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Terms can be used once, more than once, or not at all. peptide purines nucleosides phosphate sugar nucleotides nitrogenous bases strands pyrimidines 1. DNA is comprised of four different types of group, and one of four Reset Help Each one is made up of a pentose 2. Adenine, guanine, cytosine and thymine are 3. Adenine and guanine, which have a nine-member double-ring, are called 4. Cytosine and thymine, which have a six-member single-ring, are called