See explanation below.
Work Step by Step
1 The hydrogen bonding of complementary nitrogen bases, one purine and one pyrimidine is called base pairing. Base-pairing occurs between the complementary strands of a DNA molecule or a DNA/RNA hybrid, and in the complementary pairing of codons and anticodons during the process of translation. 2 DNA consists of two polynucleotide chains wound around each other to form a double helix. The two chains are held together by complementary base pairing; that is, specific bonding between A and T bases and between G and C bases on the two strands.