I keep getting “DNA double helix” 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 has two hydrogen bonds, G-C has three -- so G-C rich DNA is more stable. Go back to the definition — two antiparallel strands held together by complementary base pairs, A with T and G with C.
Key point
DNA double helix
Common mistake
pairing adenine with guanine or cytosine.
Memory tip
A-T has two hydrogen bonds, G-C has three -- so G-C rich DNA is more stable.
Tap to watch or see it right here — the app stays open (it only opens a quick search if nothing embeddable is found).