Question

Match the LIST-I with LIST-II

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-III, C-IV, D-I
• C. A-III, B-IV, C-I, D-II
• D. A-IV, B-I, C-II, D-III

Hint:

Key Enzyme Markers:
Arginosuccise = Urea Cycle.
Thiolase = Fatty acid $\beta$-oxidation.
Isocitrate Dehydrogese = TCA Cycle.
Cytochrome c Oxidase = Complex IV of ETC.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
The question requires matching metabolic pathways listed in LIST-I with their characteristic key enzymes listed in LIST-II.

Step 2: Key Formula or Approach:
Associate each metabolic pathway with its sigture enzymatic catalyst:
• Urea Cycle: Arginosuccise (Arginosuccite lyase).

• $\beta$-Oxidation: Thiolase ($\beta$-Ketoacyl-CoA thiolase).

• Citric Acid Cycle: Isocitrate Dehydrogese.

• Electron Transport Chain: Cytochrome c Oxidase (Complex IV).

Step 3: Detailed Explation:

• A. Urea cycle $\to$ IV. Argino-succise: Arginosuccise cleaves arginosuccite into arginine and fumarate in the fourth step of the urea cycle.

• B. $\beta$-oxidation $\to$ I. Thiolase: Thiolase catalyzes the fil thiolytic cleavage step of $\beta$-oxidation, releasing acetyl-CoA from acyl-CoA.

• C. Citric acid cycle $\to$ II. Isocitrate dehydrogese: Catalyzes the rate-limiting oxidative decarboxylation of isocitrate to $\alpha$-ketoglutarate in the TCA cycle.

• D. Electron transport chain $\to$ III. Cytochrome c oxidase: Complex IV of the respiratory chain transfers electrons from reduced cytochrome c to molecular oxygen.

Step 4: Fil Answer:
The correct matching combition is A-IV, B-I, C-II, D-III.