Protein synthesis - basic
- Created by: Rachel
- Created on: 10-01-13 18:49
View mindmap
- Protein synthesis
- Step 1 - transcription
- The double helix of DNA for a gene "unzips" so that the template for the new substance can be made.
- Base pairs are organised into groups of three - Triplets (sometimes called codons)
- Step 2 - translation
- The mRNA template passes out of the nucleus through a pore and attaches to a ribosome in the cytoplasm.
- The ribosome matches mRNA triplet combinations to complimenting transfer tRNA molecules.
- Each tRNA molecule is attached to an amino acid, of which there are approximately twenty naturally occuring.
- The order of amino acids depends on the order of base pairs on the mRNA.
- The ribosome then forms a bond between each amino acid - this structure is called a polypeptide.
- To complete the process the polypeptide is folded into a precise 3D structure which is known as a protein.
- The ribosome then forms a bond between each amino acid - this structure is called a polypeptide.
- The order of amino acids depends on the order of base pairs on the mRNA.
- Step 1 - transcription
Comments
No comments have yet been made