Biology A-Level
four bases and twenty amino acids
What four bases and twenty amino acids means in Biology A-Level, as defined for AQA.
Definition of four bases and twenty amino acids
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Reference: AQA
DNA contains only four different bases, whereas proteins are built from twenty different amino acids, allowing a practically limitless variety of structures.
Topics that use four bases and twenty amino acids
- Structure of DNA and RNA (AQA A-Level)
Related terms
- base sequence
- condensation reaction
- evidence and acceptance
- hydrogen bonds
- messenger RNA
- nuclear pore
- nucleotide structure
- relative simplicity of DNA
Using four bases and twenty amino acids in the exam
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