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KVPY Sample Paper KVPY Stream-SX Model Paper-1

  • question_answer
    Go through the following facts
    I. AAG always codes for lysine. It cannot code for any other amino acid.
    II. Serine amino acid can be coded by UCU/UCC/UCA or UCG
    III. UUU codes for phenylalanine in bacteria as well as human beings.
    IV. \[\operatorname{UUU}, GGG,CCC,AAA,AAC\]Code for five amino acids.
    Now point out the nature of genetic code after reading the above statements.

    A) I-Specificity/non-ambiguity of code; II-Universality of code; Ill-Degeneracy of code; IV-Triplet and non-overlapping code

    B) I-Specificity/non-ambiguity of code; II- Degeneracy of code; Ill-Universality of code; IV-Triplet and non-overlapping code

    C) I-Specificity/non-ambiguity of code; II- Degeneracy of code; Ill-Universality of code; IV-Triplet and overlapping code

    D) I-Specificity/non-ambiguity of code; II- Universality of code; Ill-Degeneracy of code; IV-Triplet and overlapping code

    Correct Answer: B

    Solution :

    [b] Specificity/non-ambiguity nature of code is that one codon codes for only one amino acid. Degeneracy nature of code represents that some amino acids are coded by more than one codon. Universality nature of code represents that one particular codon, codes amino acid in bacteria as well as human beings. Every codon is triplet i.e., out of total 64 codons, 61 code for amino acids and 3 codons do not code for any amino acids.


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