Which description best matches the Golgi apparatus?

• A. Made of ribosomes only
• B. Composed of membrane-bound vesicles
• C. A network of cristae
• D. A single large vesicle

Answer: (B)

The Golgi apparatus is a stack of flattened, membrane-bound sacs that acts as the cell’s shipping and processing center. It receives cargo in vesicles from the endoplasmic reticulum, modifies proteins and lipids (such as adding sugar chains), then packages and sorts them into new vesicles for delivery to various destinations inside or outside the cell. This makes the description that it is composed of membrane-bound compartments the best fit, since its structure is built from membrane-bound sacs rather than ribosomes, cristae, or a single large vesicle. Ribosomes are involved in protein synthesis on the rough endoplasmic reticulum, cristae are folds of the inner mitochondrial membrane, and a single large vesicle would describe organelles like vacuoles or lysosomes, not the Golgi.