Question

which best describes a codon?
a cell structure that gives the master instructions for an organism
a segment of dna that is the basis of heredity in organisms
the sequence of three bases that codes for a specific amino acid
the basic unit of structure and function of all living things

Explanation:

A codon is a sequence of three - nucleotide bases in mRNA that codes for a specific amino acid during protein synthesis. The first option describes the nucleus as a cell structure with master instructions. The second option describes a gene as a segment of DNA for heredity. The fourth option describes a cell as the basic unit of life.

Answer:

the sequence of three bases that codes for a specific amino acid