Final answer:
Mitochondria use glucose as the macronutrient for energy production.
Step-by-step explanation:
The macronutrient used by mitochondria is glucose. Glucose is a type of carbohydrate and is the primary source of energy for the body. It is broken down within the mitochondria through a process called cellular respiration, which produces ATP (adenosine triphosphate) as the energy currency of the cell.