A codon codes for what?

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Study for the Biology Marking Period 2 Test. Ace your exam with our comprehensive review featuring flashcards and multiple choice questions, all with detailed hints and explanations. Prepare thoroughly and succeed.

Multiple Choice

A codon codes for what?

Explanation:
A codon is a three-nucleotide sequence in mRNA that tells the ribosome which amino acid to add next during protein synthesis. Because of the genetic code, each codon corresponds to a specific amino acid (or to a stop signal). So a codon codes for an amino acid. It doesn’t code for a whole protein, nor for a nucleotide or a lipid—those are different kinds of molecules. This is why the correct interpretation is that a codon specifies which amino acid to incorporate into the growing polypeptide.

A codon is a three-nucleotide sequence in mRNA that tells the ribosome which amino acid to add next during protein synthesis. Because of the genetic code, each codon corresponds to a specific amino acid (or to a stop signal). So a codon codes for an amino acid. It doesn’t code for a whole protein, nor for a nucleotide or a lipid—those are different kinds of molecules. This is why the correct interpretation is that a codon specifies which amino acid to incorporate into the growing polypeptide.

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