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EAMCET Medical EAMCET Medical Solved Paper-2010

  • question_answer
    Which of the following statements related to protein synthesis are true? I. Transcribed hnRNA and mRNA of gene are similar in size. II. The 3 CCA end of tRNA acts as amino acid binding site. III. f-met- tRNA binds on to the P site in ribosome. IV. The protein factor called KF3 helps in recognizing the termination codon.

    A)  I, III                                      

    B)  II, III

    C)  II, IV                                     

    D)  I, IV

    Correct Answer: B

    Solution :

                     The ribosome has three sires: the A site , the P site and the E site. The A site is the point of entry for the aminoacyl tRNA. The first aminoacyl tRNA (f-met-(RNA) enters at the P site, here peptidyl [RNA is formed on the ribosome, E site is the exit site of the now uncharged tRNA after it gives its ammo acid to the growing peptide chain.


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