Which best describes a codon? A. A sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule. B. A protein that helps in the replication of DNA. C. A part of the cell that is involved in the process of translation. D. A segment of DNA that contains instructions for building a protein.
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- A codon is a fundamental unit in genetics - It relates to the genetic code that provides instructions for protein synthesis - The term specifically describes a sequence of nucleotides

Final Answer

A sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule.