MCAT Question of the Day
    •

    Q:

    		 Which of the following statements is incorrect about introns?
    		 

    A

    		 they are present in the functional, transcribed mRNA

    B

    		 they are part of the primary transcript in eukaryotes

    C

    		 they are composed of pyrimidine and purine residues

    D

    		 they are excised from transcribed mRNA



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