In DNA, here are the nucleotides that pairs with each other.
¤ Adenine (A) pairs with Thymine (T).
¤ Cytosine (C) pairs with Guanine (G).
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If one chain of a DNA molecule has a nucleotide sequence C, C, G, C, T, the sequence of nucleotides on its partner chain is G, G, C, G, A.
C = G
C = G
G = C
C = G
T = A