Which codon codes for leucine?

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Study for the DNA History, Replication, and Protein Synthesis Test. Access flashcards and multiple choice questions with detailed hints and explanations. Prepare effectively for your exam!

Multiple Choice

Which codon codes for leucine?

Explanation:
Codons are three-nucleotide sequences in mRNA that specify which amino acid will be added during protein synthesis. Leucine is encoded by six different codons: UUA, UUG, CUU, CUC, CUA, and CUG. The triplet CUU is one of these, so it codes for leucine. The other options correspond to different amino acids: AUG is methionine (and also the start signal for translation), UUU codes phenylalanine, and UGU codes cysteine. Because the genetic code uses redundancy, multiple codons can specify the same amino acid, which is why CUU correctly codes for leucine.

Codons are three-nucleotide sequences in mRNA that specify which amino acid will be added during protein synthesis. Leucine is encoded by six different codons: UUA, UUG, CUU, CUC, CUA, and CUG. The triplet CUU is one of these, so it codes for leucine. The other options correspond to different amino acids: AUG is methionine (and also the start signal for translation), UUU codes phenylalanine, and UGU codes cysteine. Because the genetic code uses redundancy, multiple codons can specify the same amino acid, which is why CUU correctly codes for leucine.

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