The organelle that breaks down food into molecules the cell can use is the lysosome.

Here's why:

* Lysosomes are membrane-bound organelles containing enzymes that can break down various materials, including:

* Proteins

* Carbohydrates

* Lipids

* Nucleic acids (DNA and RNA)

* Old or damaged organelles

* This process is called cellular digestion or phagocytosis.

* The breakdown products are then released into the cytoplasm where they can be used by the cell for energy, growth, and repair.