Articles > Quizzes & Surveys > Codon definition – quiz Codon definition – quiz Quiz Choose the best answer. 1. What is a codon? A sequence of three nucleotides A sequence of two nucleotides A single nucleotide 2. A codon codes for ... an amino acid a fatty acid a nucleotide 3. Where is codon found? rRNA mRNA tRNA 4. Cysteine encoded by either UGU or UGC indicates that ... the genetic code is devoid of any punctuation the genetic code is non-overlapping the genetic code is degenerate 5. Which biological process are codons used for? Carbohydrate synthesis Lipid synthesis Protein synthesis Send Your Results (Optional) Your Name To Email Time is Up!