alleryStart learning →A codon in mRNA is made up of how many consecutive nucleotides?
AOne nucleotide
BTwo nucleotides
CThree nucleotides
DFour nucleotides
Answer & Solution
Correct answer: C. Three nucleotides
1. A codon is three consecutive nucleotides in mRNA.
2. Each codon either specifies one amino acid or signals release of the polypeptide chain.
3. Doublets would be too few to cover 20 amino acids, and no coding unit of four bases is used.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 15 "Genes and Proteins", section 15.1 The Genetic Code_
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