Question

Feedback inhibition of enzyme is influenced by

• A. Enzyme
• B. External factors
• C. End product
• D. Substrate

Answer 1

Answer: (C)

End product

Feedback inhibition is the process by where the end product terminates the reaction. The accumulation of the end product interferes with the enzymatic activity by changing the shape of its active site. On changing the shape of the active site, the substrate does not attach to the active site and thus the reaction terminates. During glycolysis, the glucose changes to glucose 6 phosphates in presence of hexokinase. When the amount of glucose 6 phosphate exceeds it deactivate hexokinase.

So, the correct answer is option C.