Which molecules must be present in order for energy production to occur in the mitochondria of an animal cell?

For energy production to occur in the mitochondria of an animal cell, key molecules include glucose or fatty acids, oxygen, and adenosine triphosphate (ATP). Glucose or fatty acids serve as fuel sources that undergo oxidative phosphorylation, where oxygen acts as the final electron acceptor in the electron transport chain. Additionally, ATP is produced as a result of cellular respiration, providing energy for various cellular processes.