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The correct match between Item I and Item II is: Item I (A) Allosteric effect (B) Competitive inhibitor (C) Receptor (D) Poison Item II (P) M molecule binding to the active site of enzyme (Q) M molecule crucial for communication in the body (R) M molecule binding to a site other than the active site of enzyme (S) M molecule binding to the enzyme covalently (1) (A)→(P); (B)→(R); (C)→(Q); (D)→(S) (2) (A)→(P); (B)→(R); (C)→(S); (D)→(Q) (3) (A)→(R); (B)→(P); (C)→(S); (D)→(Q) (4) (A)→(R); (B)→(P); (C)→(Q); (D)→(S)

1. (A)→(P); (B)→(R); (C)→(Q); (D)→(S)
2. (A)→(P); (B)→(R); (C)→(S); (D)→(Q)
3. (A)→(R); (B)→(P); (C)→(S); (D)→(Q)
4. (A)→(R); (B)→(P); (C)→(Q); (D)→(S)

Correct answer: (A)→(P); (B)→(R); (C)→(Q); (D)→(S)

Solution

The correct option accurately matches allosteric effects with binding to a site other than the active site (R), competitive inhibitors with binding to the active site (P), receptors with their role in communication (Q), and poisons with covalent binding (S), reflecting their respective biochemical interactions.

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