Most codons specify a(n)_____.a. proteinc. amino acidb. polypeptided. mRNA

Step by Step Solution: Step 1. Understand that a codon is a sequence of three nucleotides that form the genetic code in DNA or RNA molecules. Step 2. Recall that the genetic code is based on the correspondence between a codon and the amino acid that it specifies. Step 3. Realize that each codon specifies a particular amino acid, except for three codons (UAA, UAG, and UGA) that act as stop signals to end protein synthesis. Step 4. Based on the above information, we know that codons specify amino acids Final Answer: amino acid