Biochemistry PDF | PDF | Cell (Biology) | Biochemistry - Scribd WebThe enzyme then progresses along the template strand in the 3 to 5 direction, synthesizing a complementary RNA molecule with elongation occurring in the 5 to 3 direction. The DNA sequence also dictates where termination of RNA synthesis will occur.[20] RNAs are often modified by enzymes after transcription. For example, a poly(A) tail and a 5' cap are …