Transcription

Posted on Updated on

  • takes place in the nucleus
  • DNA double helix unzip/ unwind strands are broken this reaction is catalysed by the enzymes DNA HELICASE
  • The exposed DNA Nucleotides complenary base pairs with free activated RNA nucletioides in the nucleus’s
  • Enzyme RNA POLYMERASE joins RNA nucleotide together in a condensation reaction.
  • m-RNA detaches from the DNA
  • m-RNA Protected is completed to the DNA coding strand
  • m-RNA leaves the nucleus though the pore in the nucleus envelope and attaches to the ribosome in the cytoplasm.

Steps of Transcription

Transcription takes place in steps: initiation, elongation, and termination.

  1. Initiation is the beginning it when the enzymes catalyst RNA polymerase  which makes the DNA to unwind
  2. This helps m-RNA
  3. Elongation is the when you add more nucleotides to the mRNA strand.
  4. Termination is the ending of transcription, its when the rna polymerase meets a STOP CODON.
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s