Which of the following is an example of a gene that is regulated by metabolic or environmental conditions?
Which of the following is an example of a gene that is regulated by metabolic or environmental conditions?
DNA polymerase
Beta-galactosidase
RNA polymerase
Helicase
Solution
Beta-galactosidase is an enzyme that is synthesised by E. coli and is used to catalyse the hydrolysis of a disaccharide, lactose into galactose and glucose, which are used as a source of energy. Therefore, the synthesis of beta-galactosidase is regulated by the presence or absence of lactose.