Which of the following statements concerning the “Genetic Code” is incorrect? Th
ID: 225606 • Letter: W
Question
Which of the following statements concerning the “Genetic Code” is incorrect?
The code consists of 3-base combinations
The code is nearly universal from simple prokaryotes to complex eukaryotes
Translational start and stop codons are coded by specific triplets
Each amino-acid is uniquely coded by a single triplet code
The code is linear and uninterrupted for a single polypeptide
A.The code consists of 3-base combinations
B.The code is nearly universal from simple prokaryotes to complex eukaryotes
C.Translational start and stop codons are coded by specific triplets
D.Each amino-acid is uniquely coded by a single triplet code
E.The code is linear and uninterrupted for a single polypeptide
Explanation / Answer
Each amino-acid is uniquely coded by a single triplet code- this is incorrect. Because there are 64 codon triplets present for 20 aminoacids. Other than methionine(AUG) and tryptophan(UGG) all other aminoacids have 2 or more specific codons. this is the degeneracy of genetic code.
D.Each amino-acid is uniquely coded by a single triplet code- this is incorrect. Because there are 64 codon triplets present for 20 aminoacids. Other than methionine(AUG) and tryptophan(UGG) all other aminoacids have 2 or more specific codons. this is the degeneracy of genetic code.
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