Q. In the liver, detoxifying enzymes are localized in what organelle?
4) Golgi apparatus
5) Smooth endoplasmic reticulum
6) Rough endoplasmic reticulum
Answer: 5) Smooth endoplasmic reticulum
Explanation: The enzymes of the smooth endoplasmic reticulum in the liver cells of vertebrates help in detoxifying toxic and poisonous materials. The smooth endoplasmic reticulum contains most of the enzymes (e.g., cytochrome P450 enzymes) that catalyze many reactions in the liver cells.