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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2007

  • question_answer
    In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids?

    A)  61                                         

    B)  60

    C)  20                                         

    D)  64

    Correct Answer: A

    Solution :

    Out of 64 codons three (UAA, UAG, UGA) are chain terminating codons- the translating mechanism is not able to read these codons 61 codons are used to code all the 20 essential amino acids.  Out of 64, 3 codons, UAA, UAG, UGA does not code any amino acid molecule.


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