Biology A-Level
hydrogen bonds
What hydrogen bonds means in Biology A-Level, as defined for AQA.
Definitions of hydrogen bonds
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Reference: AQA
Form between the slightly positive and slightly negative parts of the backbone in secondary structure, and between polar R groups in tertiary structure; each is weak but collectively they matter.
These hold the two polynucleotide chains together between specific complementary base pairs, and each one is weak.
Topics that use hydrogen bonds
- General properties of proteins (AQA A-Level)
- Structure of DNA and RNA (AQA A-Level)
Related terms
- condensation reaction
- active sites and binding sites
- amino acids
- base sequence
- carboxyl and amine groups
- condensation arithmetic
- denaturation
- disulfide bridges
Using hydrogen bonds in the exam
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