A) A-T,G-C
B) A-G, T-C
C) G-T/A-C
D) A-A, T-T
Correct Answer: A
Solution :
The structure of DNA molecule is a double helicle structure. In this structure double helix are made up of polynucleotide chains which are held together by H-bonds. In these helixes the adenine [a] base is linked with thymine (T) by two H-bonds and guanine (G) is linked with cytocine [c] by three H-bonds as A = T, and \[G\equiv C\].
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