NEET AIPMT SOLVED PAPER 2003

  • 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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