Protein Synthesis

II. mRNA Processing-the mRNA strand must be prepared to leave the nucleus.
      A. As the mRNA molecule forms a methylated cap is added to the 5' end (head) 
mRNA--CH2-CH2-CH2-......CH2-CH2.
      B. After it's made a poly-A tail is added (chain of Adenine nucleotides) and a series of proteins cover the tail. mRNA--A-A-A-A-A-A....A-A
      C. Splicing- not all mRNA is genetic. Part of it is cut out (Introns) and the rest (Exons) are spliced back together into a single molecule.
   
              Exon      Intron       Exon       Intron       Exon   
Before:  ___________________________________

During:  ___________________________________
                                    0                                    0
After:  _______ ________________________ ______
                        0                                              0


How Translation works: