Biology A-Level
Codon
What Codon means in Biology A-Level, as defined for Pearson Edexcel.
Definition of Codon
A sequence of three adjacent nucleotides on an mRNA molecule that codes for a specific amino acid.
Topics that use Codon
- Topic 1: Lifestyle, Health and Risk (Pearson Edexcel A-Level)
Related terms
Using Codon in the exam
Definition questions usually carry one or two marks, and examiners look for the precise wording. Write the definition from memory, check it against the version above, and then use the term in a longer answer on the same topic so it sticks.
Practise Biology questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Biology A-Level terms7 days Premium · Then free forever · No card, no charge