Question

which amino acid, if any, does the codon ugg encode?
none, ugg is a start codon.
none, ugg is a stop codon.
met (methionine)
gly (glycine)
trp (tryptophan)

Explanation:

To determine the amino acid encoded by UGG, we refer to the genetic code table. Looking at the table, the first position is U, the second is G, and the third is G. Locating the codon UGG, we see it corresponds to Trp (tryptophan). The start codon is AUG, and stop codons are UAA, UAG, UGA. So UGG is not a start or stop codon, and it encodes Trp.

Answer:

Trp (tryptophan)