Drugs and certain other chemicals that could damage a cell are broken down by which organelle?

• A. Endoplasmic Reticulum
• B. Golgi apparatus
• C. Mitochondria
• D. Nucleus

Answer: (A)

Detoxifying drugs and other potentially damaging chemicals mainly happens in the smooth endoplasmic reticulum. This part of the ER houses enzymes, especially the cytochrome P450 family, that perform oxidation and other reactions (Phase I metabolism) to convert lipophilic substances into forms that are easier to eliminate in the body. While the rough ER is involved in making and folding proteins, and the Golgi apparatus modifies and ships those molecules, the detox role sits with the smooth ER. Mitochondria provide energy and can influence cell fate, while the nucleus stores genetic material, but neither is the primary site for breaking down drugs. So the endoplasmic reticulum is the organelle responsible for this detox process.