Match List-I with List-II and select the answer using the codes given below the Lists: List-I (Structure/Organelle): A. Mitochondria, B. Cytoskeleton, C. Smooth ER, D. Vacuoles. List-II (Function): 1. Maintenance of cell shape, 2. Detoxification in liver cells, 3. Storage of chemicals and cell enlargement, 4. Cellular respiration. Codes: A B C D

Mitochondria are the sites of cellular respiration where ATP is generated (A-4). The cytoskeleton, made up of microtubules and microfilaments, maintains cell shape and provides structural support (B-1). The smooth endoplasmic reticulum is involved in lipid synthesis and in detoxification of drugs and poisons, especially in liver cells (C-2). Vacuoles store water, ions and other chemicals and contribute to cell enlargement in plant cells (D-3). The correct matching is therefore A-4, B-1, C-2, D-3.