Biology › Section B · Biological macromolecules › Topic B.5
Nucleic acids
Nucleic acids are the only macromolecules whose job is information: DNA archives the instructions for building every protein an organism will ever need, and RNA carries those instructions to the machinery that reads them. Both are built from the same small part — the nucleotide — arranged into a code written in four letters.
In this topic
- The molecule of heredity
- The nucleotide: one part, three pieces
- Chargaff's clues
- The double helix
- DNA versus RNA: the deliberate differences
- Worked example: building the complementary strand
- Worked example: reading Chargaff percentages
- Common mistakes to avoid
- Key takeaways
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