Translating DNA template strand to mRNA codon for amino acid

Steps:

• Read the template strand from 3' to 5' as shown in the diagram (5' to 3' coding strand given, template complementary).
• Transcribe to mRNA: replace A with U, T with A, G with C, C with G; mRNA reads 5' to 3' complementary to template.
• Form codon from mRNA bases: position 1 (center wheel), position 2 (middle), position 3 (edge).
• Locate codon on wheel: UGG matches Trp on outer edge.

Why C is correct:

• Trp is encoded solely by the codon UGG per genetic code.

Why the others are wrong:

• A. Gly: Encoded by GGN codons (GGU, GGC, GGA, GGG).
• B. Pro: Encoded by CCN codons (CCU, CCC, CCA, CCG).
• D. Thr: Encoded by ACN codons (ACU, ACC, ACA, ACG).

Final answer: C