GENE REGULATION

Gene regulation is a process in which a cell determines which genes it will express and when it will take place.This term can also be said as regulation of gene expression.So this process is essential for viruses,prokaryotes, and eukaryotes.The first discovered example of a gene regulation system was the lac operon in which protein involved in lactose metabolism are expressed only in the presence of lactose and absence of glucose.Furthermore, gene regulation drives the processes of cellular differentiation leading to the creation of different cell types in multicellular organisms where the different types of cells may possess different gene expression profiles though they all possess the same genome sequence.