Final answer:
Lipid and toxic molecule breakdown occurs in lysosomes and peroxisomes within a cell.
Step-by-step explanation:
The breakdown of lipids and toxic molecules occurs in different organelles within a cell.
Lysosomes are organelles that aid in the breakdown of lipids, proteins, and other macromolecules. They contain digestive enzymes that break down these molecules into smaller components.
Peroxisomes are organelles that carry out oxidation reactions to break down fatty acids and amino acids. They also detoxify poisons that enter the body. These reactions produce hydrogen peroxide, which is broken down safely within peroxisomes.