πŸ—οΈ Polypeptide synthesis (CCEA)

The complete set of genes in a cell is known as the genome while the full range of proteins a cell can make is the proteome. These are the steps that bridge these two realms.

 

Proteins are made up of amino acids linked by peptide bonds, therefore a protein may be referred to as a polypeptide (of course, some proteins such as haemoglobin have extra bits to them). All are encoded for by the information stored in DNA. Let’s see how exactly this happens.

 

Transcription: DNA to mRNA

 

In a process called transcription, mRNA is formed based on DNA. The bases on the coding strand of DNA are transcribed into a new molecule, mRNA, which is synthesised by the enzyme RNA polymerase…