Question

which organelle breaks down sugar molecules that supply energy to the cell?
golgi apparatus
nucleus
endoplasmic reticulum
mitochondrion

Explanation:

The mitochondrion is known as the "powerhouse of the cell." It carries out cellular respiration, breaking down sugar (glucose) molecules through processes like glycolysis, the Krebs cycle, and oxidative phosphorylation. These processes generate ATP (adenosine triphosphate), which is the energy - currency of the cell.
The Golgi apparatus is involved in modifying, sorting, and packaging proteins and lipids. The nucleus contains the cell's genetic material and controls cellular activities like growth and reproduction. The endoplasmic reticulum is involved in protein and lipid synthesis and transport.

Answer:

mitochondrion