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Question
Which amino acid is specified by genetic codes ACU, ACC, ACA, ACG showing degeneracy?
Which amino acid is specified by genetic codes ACU, ACC, ACA, ACG showing degeneracy?
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Solution
The correct option is D Threonine
Genetic code shows degeneracy which means that multiple codons specify particular amino acid. Amino acid leucine is encoded by 6 codons; UUA, UUG, CUU, CUC, CUA and CUG, thus it shows degeneracy but is not encoded by codons given in the question which makes option A wrong. Methionine is the exception to code degeneracy as it is encoded by single codon “AUG” which makes option B wrong. Glycine is encoded by GGU, GGC, GGA and GGG; thus shows code degeneracy but is not specified by codons mentioned in question which makes option C incorrect. Threonine is encoded by multiple codons ACU, ACC, ACA and ACG; option D is the correct answer.
Genetic code shows degeneracy which means that multiple codons specify particular amino acid. Amino acid leucine is encoded by 6 codons; UUA, UUG, CUU, CUC, CUA and CUG, thus it shows degeneracy but is not encoded by codons given in the question which makes option A wrong. Methionine is the exception to code degeneracy as it is encoded by single codon “AUG” which makes option B wrong. Glycine is encoded by GGU, GGC, GGA and GGG; thus shows code degeneracy but is not specified by codons mentioned in question which makes option C incorrect. Threonine is encoded by multiple codons ACU, ACC, ACA and ACG; option D is the correct answer.
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