alleryStart learning →How many nucleotides make up 12 mRNA codons?
AThirty-six nucleotides
BTwenty-four nucleotides
CForty-eight nucleotides
DTwelve nucleotides
Answer & Solution
Correct answer: A. Thirty-six nucleotides
1. Each codon is a three-nucleotide sequence.
2. Twelve codons therefore carry 12 times 3 nucleotides.
3. That gives 36 nucleotides, so counting two bases per codon or one base per codon gives the wrong totals.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 15 "Genes and Proteins", section 15.1 The Genetic Code_
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