I keep getting “DNA structure” questions wrong in Molecular Basis of Inheritance. What's the trap?
pairing adenine with guanine or cytosine.
The usual trap: pairing adenine with guanine or cytosine. How to avoid it: A–T (2 hydrogen bonds), G–C (3 hydrogen bonds) — always. Go back to the definition — a double helix held by complementary base pairing: adenine with thymine, guanine with cytosine.
Key point
DNA structure
Common mistake
pairing adenine with guanine or cytosine.
Memory tip
A–T (2 hydrogen bonds), G–C (3 hydrogen bonds) — always.
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