Users' questions

What is enzyme repression?

What is enzyme repression?

Repression, in metabolism, a control mechanism in which a protein molecule, called a repressor, prevents the synthesis of an enzyme by binding to—and thereby impeding the action of—the deoxyribonucleic acid that controls the process by which the enzyme is synthesized.

What is the difference between enzyme inhibition and enzyme repression?

In feedback inhibition, the product itself inhibits the enzyme in order to control the amount of product. The product binds with the active site of the enzyme and prevents the binding of the substrate with the enzyme. In feedback repression, the end product inhibits the production of the enzyme at the gene level.

What is control induction and repression?

Genetic Control of Enzyme Synthesis through Repression, Induction, or Enhancement of Transcription. Genetic control of enzyme activity refers to controlling transcription of the mRNA needed for an enzyme’s synthesis.

What is the difference between induction and repression of operon?

The induction system significantly turns on the operon system by allowing the association of inducer and repressor protein. In contrast, the repression system switches off the operon system through a complex formed by the combination of corepressor and apo-repressor protein.

How is feedback repression different from enzyme inhibition?

Feedback repression is another way of enzyme inhibition. In feedback repression, the accumulated end products repress the synthesis of the very first enzyme that catalyzes the initial stage of the biochemical pathway. It occurs at the gene or genetic level.

Which is an example of the repression of an enzyme?

Repression typically operates by feedback inhibition. For example, if the end product of a series of enzyme-catalyzed reactions is a particular amino acid, that amino acid acts as the repressor molecule to further production. Often the repressor will combine with another molecule and the duo is able to block the operation of the operator.

What happens when a gene is blocked in enzyme repression?

Either way, the result is the blockage of the transcription of the particular gene. The gene that is blocked in enzyme repression tends to be the first enzyme in the pathway leading to the manufacture of the repressor. Thus, repression acts to inhibit the production of all the enzymes involved in the metabolic pathway.

Why do microorganisms need enzyme induction and repression?

Enzyme induction and repression. The ability of microorganisms such as bacteria to control the activity of inducible enzymes is vital for their survival. The constant activity of such enzymes could result in the over-production of a compound, which would be an energy drain on the microorganism.