Question

Which of the following is an example of feedback inhibition?
(A) Cyanide action on cytochrome
(B) Sulphur drug on folic acid synthesizer bacteria
(C) Inhibition of hexokinase by ${\text{glucose}} - 6 - {\text{phosphate}}$
(D) Reaction between succinic dehydrogenase and succinate

Answer 1

Hint: Feedback inhibition is the process in which the activity of the enzymes get retarded by the end product produced by the same enzymes. Hence the enzyme working stops after the desired output is obtained. In the complex biochemical processes, there involved the more enzymes to obtain the end product

Complete answer:
Feedback inhibition is the process that occurs at the end of the metabolic process in the cell and it inhibits the catalyzing of an enzyme. The finished result is the inhibitor and the compound inactivated is called allosteric chemical. The catalyst is controlled by modulators that quandary noncovalently at site other than the dynamic site.

An example of the feedback inhibition is the hindrance of the action of the protein hexokinase by glucose 6-phosphate in glycolysis. This protein catalyzes the change of glucose into glucose 6-phosphate however as the response continues, the addition in grouping of ${\text{glucose}} - 6 - {\text{phosphate}}$ restrains the action of hexokinase. Hence the example of the feedback inhibition is the inhibition of the hexokinase by the ${\text{glucose}} - 6 - {\text{phosphate}}$

Hence the correct answer is OPTION(C)

Note: The other examples of the feedback inhibition is production of the ATP molecules, production of the amino acids and the cholesterol needed for the metabolism. Hence the feedback inhibitor helps in the maintenance of the homeostasis of the body.