transcripion

• transcription is the process in which a complementary mRNA copy of one gene of DNA is created
• 1. DNA helicase breaks hydrogen bonds between bases in both strands of DNA
• 2) causes DNA helix to unwind and only one strand acts as a template
• 3) free floating mRNA aligns opposite complementary bases on template strand
• 4) enzyme RNA polymerase joins together adjacent RNA nucleotides forming phosphodiester bonds creating new polymer chain
• 5) once gene is copied mRNA leaves nucleus via nuclear pores and enters cytoplasm