Indian Forest Service (Mains), Chemistry optional · 2021 · Paper II

Q5(b). DNA bases and pairing

Question

Draw the four DNA bases and show the hydrogen bonding between their base pairs.

Adenine pairs with thymine through two hydrogen bonds; guanine pairs with cytosine through three.

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The full model answer

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CoversDNA basesWatson–Crick base pairingadenine–thymineguanine–cytosinehydrogen bonding