Question

Match List-I with List-II

List-I (Physiological process) & List-II (Site of the reaction)
(A). Glycolysis & (IV). Cytoplasm
(B). Citric Acid Cycle & (I). Mitochondrial Matrix
(C). $\text{F}_o\text{-F}_1$ ATP synthase & (III). Inner membrane of Mitochondria
(D). Calvin Cycle & (II). Stroma of Chloroplast

Choose the correct answer from the options given below:

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

Hint:

To remember cellular locations:
- Glycolysis $\rightarrow$ Cytosol
- TCA Cycle $\rightarrow$ Mitochondrial Matrix
- Light Reactions $\rightarrow$ Thylakoid Membrane
- Dark Reactions (Calvin) $\rightarrow$ Chloroplast Stroma

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Eukaryotic cells are compartmentalized into organelles to separate metabolic pathways, prevent competing reactions, and optimize chemical gradients.

Step 2: Detailed Explanation:
Let us match the metabolic processes with their intracellular locations:
- (A) Glycolysis $\rightarrow$ (IV) Cytoplasm: Glycolysis converts glucose into pyruvate. All ten enzymes in this pathway are located in the cytoplasm (cytosol).
- (B) Citric Acid Cycle (Krebs cycle) $\rightarrow$ (I) Mitochondrial Matrix: Pyruvate is imported into the mitochondria, where the enzymes of the citric acid cycle reside in the soluble matrix.
- (C) $\text{F_o\text{-F}_1$ ATP synthase} $\rightarrow$ (III) Inner membrane of Mitochondria: The multi-subunit ATP synthase complex is embedded in the inner mitochondrial membrane, using the proton gradient across this membrane to synthesize ATP during oxidative phosphorylation.
- (D) Calvin Cycle $\rightarrow$ (II) Stroma of Chloroplast: The light-independent reactions of photosynthesis fix $\text{CO}_2$ into carbohydrates within the stroma of the chloroplast.
This matches the sequence in Option (A).

Step 3: Final Answer:
The correct matching corresponds to Option (A).