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EEJ MAIN Chemistry QUESTION #5524
Question 1
Match the following: Column I — (A) Allosteric effect, (B) Competitive inhibitor, (C) Receptor, (D) Poison; Column II — (P) Molecule binding to the active site, (Q) Molecule crucial for body communication, (R) Molecule binding to a site other than the active site, (S) Molecule binding covalently to the enzyme
  • $(A)\to(R);\ (B)\to(P);\ (C)\to(Q);\ (D)\to(S)$✔️
  • $(A)\to(P);\ (B)\to(R);\ (C)\to(Q);\ (D)\to(S)$
  • $(A)\to(R);\ (B)\to(P);\ (C)\to(S);\ (D)\to(Q)$
  • $(A)\to(P);\ (B)\to(R);\ (C)\to(S);\ (D)\to(Q)$
Correct Answer Explanation
Allosteric effect: A molecule binds to a site other than the active site, altering enzyme activity → (R). Competitive inhibitor: A molecule structurally similar to the substrate binds the active site → (P). Receptor: Molecules (like hormones/neurotransmitters) crucial for body communication bind receptors → (Q). Poison: Poisons like heavy metal ions bind enzymes covalently and permanently inactivate them → (S).