What is a codon?
Answer and explanation
Correct answer: A. Three nucleotides in mRNA that code for one amino acid or a stop signal
- Step 1: The genetic code is read in triplets. Step 2. Each triplet specifies one amino acid or marks the end. Answer: a triplet of nucleotides. Why not the others: the length is wrong, and amino acids are the product, not the units of the code.
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