KCET · BIOLOGY · STD 11 - 9. Biomolecules
What is the role of competitive inhibitor during enzyme action?
- A It enhances enzyme action.
- B It declines the enzyme action
- C It alters the active site of the enzyme and prevents the binding of substrate
- D It inhibits breaking of chemical bonds of the substrate.
Answer & Solution
Correct Answer
(B) It declines the enzyme action
Step-by-step Solution
Detailed explanation
(B) It declines the enzyme action,
When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor. Consequently, the substrate cannot bind and as a result, the enzyme action declines, e.g., inhibition of succinic dehydrogenase by malonate which closely resembles the substrate succinate in structure.
When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor. Consequently, the substrate cannot bind and as a result, the enzyme action declines, e.g., inhibition of succinic dehydrogenase by malonate which closely resembles the substrate succinate in structure.
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