Question

Match metabolic pathways

• A. \( \text{A-2, B-1, C-3, D-4} \)
• B. \( \text{A-1, B-2, C-4, D-3} \)
• C. \( \text{A-2, B-3, C-1, D-4} \)
• D. \( \text{A-4, B-1, C-2, D-3} \)

Hint:

Glycolysis is the only major pathway shared by both aerobic respiration and fermentation.

Answer 1

The Correct Option is A

Concept: Cellular respiration involves a series of metabolic pathways located in specific compartments of the cell.
• These locations are optimized for the enzymes and substrates involved in each process.
• Some processes occur in the fluid cytosol, while others occur inside organelles.

Step 1: Mapping Locations and Requirements.
Glycolysis occurs in the Cytoplasm (A-2) and is the first step of glucose breakdown. The Krebs cycle (Citric Acid Cycle) occurs inside the Mitochondrial matrix (B-1).

Step 2: Completing the Match.
The Electron Transport Chain (ETC) is located on the Inner mitochondrial membrane (C-3). Fermentation is an anaerobic process, meaning it requires no oxygen (D-4). Final Answer: The correct matching is A-2, B-1, C-3, D-4.