MCAT Question of the Day
    •

    Q:

    		 Certain viruses lack 5' caps on their mRNA sequences. Which of the following answers explains one of the ways in which such viruses produce their proteins?

    		 

    A

    		 They carry their own ribosomes which do not need 5' caps in order to initiate translation

    B

    		 They use Internal Ribosomal Entry Sites (IRES) which allow for the assembly of cellular ribosomes to initiate translation

    C

    		 They carry out protein synthesis prior to infection; the mRNA is incorporated into the host nucleic acids in dormancy

    D

    		 They initiate translation from the 3' polyA tail instead of the 5' cap to avoid the problem.



    Genetic Code, Transcription, Translation | Viruses |
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