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Question

The one aspect, which is not a salient feature of genetic code, is its being

A
Ambiguous
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B
Universal
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C
Specific
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D
Degenerate
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Solution

The correct option is A Ambiguous
Genetic code is specific and this character is maintained by first two bases of codons; the first two bases make strong bonding with corresponding tRNA and determines the coding specificity. An amino acid encoded by several different codons and the codons differ in either of the first two bases, each codon requires different tRNAs. Genetic code is universal which means that a particular codon specify a particular amino acid in all the organisms. The mRNA codon "ACU" codes for threonine, irrespective of its source. Genetic code show degeneracy which means that multiple codon specifies particular amino acid; asparagine is encoded by "GAU and GAC". Genetic code is unambiguous, and not ambiguous, which means that one codon for one amino acid only; GAA codes for glutamine only. Correct answer is A.

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Translation
BIOLOGY
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