Question

13.An enzyme catalyzes the reaction X – Y + Z. In a series of experiments, it was found that substance A inhibits the enzyme. When the concentration of X is high and A is low, the reaction proceeds rapidly and Y and Z are formed. As the concentration of A increases, the reaction slows regardless of whether X is present in high or low concentration. If the concentration of A is high (relative to X), the reaction stops. If the concentration of A again decreases, the reaction will ultimately resume. What type of enzyme regulation is described here? Explain or justify your answer.

Answer 1

• Enzyme regulation described here is of competitive inhibition topes : This is case of competitive inhibition mechanism an inhibitor and substrate x combete for same binding site of enzyme and at same time. And inhibitor A O bind to enzyme sites more preferably then substrate X and all points described are itb proof or when concentration of Å increase, the reactron sloh broducing product agan concentration of A inhibitor) reduced, reactron ultimatets resume and produce product yeri