Each combination of nitrogen bases on the mRNA molecule is a codon, which
is a three-letter code for a specific amino acid. Use the Genetic Code Wheel to
answer the following items:
11.For leucine, there are _____________ different codons.
12.The codon GAU is for _____________.
13.In a stop codon, if the second base is G, the first and third bases are _____
and 14. ____.