38 ATP molecules are present in one molecule of glucose.
Explanation:
Cellular respiration can be separated into 5 stages, and every one of them - with the exception of the first - happen inside mitochondria. Changes 1 molecule of glucose into 2 particles of pyruate.
Biology textbooks often state that 38 ATP molecules can be made per oxidized glucose molecule during cellular respiration (2 from glycolysis, 2 from the Krebs cycle, and about 34 from the electron transport system).