In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion : Competitive inhibitors compete with natural substrate for their attachment on the active sites of enzymes.

Reason : In competitive inhibition, inhibitor binds to the allosteric site of the enzyme.

Assertion is correct statement but reason is wrong statement.

The correct answer is option 4. Assertion is correct statement but reason is wrong statement.

Assertion: Competitive inhibitors compete with natural substrate for their attachment on the active sites of enzymes.

This statement is correct. Competitive inhibitors are molecules that resemble the substrate and bind to the active site of the enzyme, thus competing with the natural substrate for binding.

Reason: In competitive inhibition, the inhibitor binds to the allosteric site of the enzyme.

This statement is incorrect. In competitive inhibition, the inhibitor binds to the active site of the enzyme, not the allosteric site. The allosteric site is a different site on the enzyme where non-competitive inhibitors bind, altering the enzyme's activity without directly competing with the substrate at the active site.

The assertion correctly describes competitive inhibition, where inhibitors compete with the substrate for the active site. However, the reason incorrectly describes the mechanism by stating that the inhibitor binds to the allosteric site, which is not the case in competitive inhibition.