Steps of Transcription

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Presentation transcript:

Steps of Transcription

Learning Objectives Describe the steps of DNA transcription

Central Dogma DNA Transcription RNA Translation Protein (Nucleus) (Cytoplasm) DNA Transcription RNA Translation Protein

Steps of Transcription (occurs in the nucleus) Initiation Elongation Termination

Step 1: Initiation DNA unwinding and unzipping along base pairs RNA polymerase finds the DNA and unwinds/unzips the DNA strands.

Step 2: Elongation mRNA forming Free bases RNA polymerase uses one strand of DNA as a template to assemble free nucleotides into mRNA. C G A U

Step 3: Termination Newly synthesized mRNA strand is released from DNA template. The mRNA leaves the nucleus and enters the cytoplasm. DNA re-zips and re-twists.

YouTube Video DNA Transcription

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