What is the molecule called that mitochondria produce when they respire glucose?

Adenosine triphosphate

Explanation:

Mitochondria is a cellular organelle which is associates with the production of energy molecule called "ATP" in the cell from the substrate glucose through a process called cellular respiration.

Cellular respiration is a process which oxidizes the glucose molecule to form another energy yielding molecule called ATP in four phases namely the glycolysis followed by the link reaction then the Citric acid cycle and in last the electron transport chain.

Thus, ATP is correct.