Explanation:

- Option 1: Lysosomes

- These are organelles containing enzymes for digestion, not protein synthesis.

- Option 2: Mitochondria

- Known as the powerhouse of the cell, where energy production occurs, not protein synthesis.

- Option 3: Golgi apparatus

- Involved in modifying, sorting, and packaging proteins and lipids for secretion, but not synthesizing proteins.

- Option 4: Ribosomes

- These are the cellular structures where protein synthesis happens, translating mRNA into protein chains.