Transcription and Translation

HideShow resource information

Protein Synthesis

  • DNA acts as a template providing instructions in the form of a sequence of nucleotides.
  • A complimentary section of part of theis sequence is made into mRNA through transcription.
  • mRNA acts as a template for complimentary tRNA molecules to attach to and the amino acids they carry are linked to form a polypeptide though translation.

Transcription

  • DNA helicase acts on a specific region on DNA (cistron), to break the hydrogen bonds between the bases, causing the strands to separate.
  • RNA polymerase links to the template strand of DNA at the beginning to be copied.
  • Transcription occurs when free RNA nucleotides align themselves opposite the template strand.
  • RNA polymerase moves along DNA forming bonds that add nucleotides. This results in the synthesis of mRNA alongside the unwinded DNA.
  • Behind the RNA polymerase, the DNA strands rejoin to reform the double helix.

Comments

No comments have yet been made

Similar Human Biology resources:

See all Human Biology resources »See all The genetic Code and Cell Function resources »