Which organelle is a fluid-filled sac that stores water, food, and chemicals?

• A. Lysosome
• B. Vacuole
• C. Endoplasmic Reticulum
• D. Golgi Bodies

Answer: (B)

Storage and management of substances inside a cell are handled by various organelles, and the one described as a fluid-filled sac that stores water, food, and chemicals is the vacuole. A vacuole is a membrane-bound compartment that serves as storage for water and other materials until the cell needs them. In plant cells, the large central vacuole holds a lot of water and helps keep the cell rigid through turgor pressure, while animal cells have smaller vacuoles for storage. The other organelles have different jobs: lysosomes house enzymes to digest waste, the endoplasmic reticulum is a network where proteins and lipids are made and transported, and the Golgi apparatus modifies and packages molecules for shipment. So, the fluid-filled sac used for storing water, food, and chemicals is the vacuole.