Gene expression

Every cell in a multicellular organism contains a complete set of chromosomes with every gene needed to make every protein that that organism will ever make.

However, in any particular cell, only a very small fraction of these genes are ever expressed.

Each cell is specialised to carry out a certain task and will only need to express certain genes.

Gene expression is the process by which specific genes are activated to produce a required protein.

The gene expression process is made up of the transcription and translation of DNA sequences. This involves RNA.