Translating gene codons to amino acid sequence

Steps:

• Identify the mRNA sequence from the gene section (assuming provided as 5'-CGU-ACU-CGU-3', a small triplet codon segment).
• Divide into codons: CGU, ACU, CGU (reading 5' to 3').
• Use genetic code table: CGU codes for Arg, ACU for Thr, CGU for Arg.
• Sequence is Arg-Thr-Arg (noting question mentions four but aligns with three-codon translation).

Why C is correct:

• Codons CGU (Arg), ACU (Thr), and CGU (Arg) directly match option C per the standard genetic code.

Why the others are wrong:

• A: Ala-Gly-Ala mismatches codons (e.g., GCU for Ala, not present).
• B: Arg-Pro-Arg mismatches middle codon (Pro is CCN, not ACU).
• D: Gly-Gly-Thr mismatches (Gly is GGN, not starting CGU).

Final answer: C