DNA Structure and Replication

The two strands of the double helix are first separated by the enzyme helicase, which attaches to the molecule and untwists and separates it. With the assistance of enzyme polymerase, spare nucleotides available inside the cell are bound to the individual strands following the rules of complementary base pairing: adenine (A) to thymine (T) and guanine (G) to cytosine (C).…