Protein Synthesis

Protein Synthesis

Transcription:

• RNA helicase binds to the start of the gene to be transcribed
• RNA helicase moves along breaking hydrogen bonds to expose the bases on the coding strand
• RNA nucleotides bind to exposed bases by specific complementry base pairing (scbp), uracil replaces thymine
• RNA polymerase joins the mRNA s-p backbone together by forming phosphodiester bonds
• STOP codon reached, RNA polymerase detatches and DNA forms hydrogen bonds again

Functional mRNA:

• In eukaryotes, introns and exons are both copied into mRNA
• This is called pre-mRNA
• Splicing the takes place, to remove introns and join exons together
• …