The compound 'A' (thymine, shown with structure , a methylated uracil) is a complementary base of in DNA strands.

Question

The compound 'A' (thymine, shown with structure , a methylated uracil) is a complementary base of  in DNA strands.

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Base pairing rules in DNA (Chargaff's rules):

In DNA double helix, bases pair specifically through hydrogen bonds:

| Base | Pairs with | H-bonds |
|---|---|---|
| Adenine (A) | Thymine (T) | 2 H-bonds |
| Guanine (G) | Cytosine (C) | 3 H-bonds |

Compound A = Thymine (identified by the SMILES showing a methylated pyrimidine-2,4-dione — the methyl group at C5 distinguishes thymine from uracil).

Thymine is the complementary base of Adenine in DNA.

Note: In RNA, Uracil replaces Thymine and pa

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