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Answer:
The correct answer would be glycolysis, Krebs cycle, electron transport.
Cellular respiration is the set of biochemical reactions take place in the cell in order to convert energy from nutrients into ATP (adenosine triphosphate), the energy currency of the cell.
It is started with the process of glycolysis which takes place in cytoplasm of the cell. It converts one molecule of glucose into 2 molecules of pyruvate with a net gain of 2 ATP and 2 NADH.
The pyruvate is then transported into the mitochondria with the help of pyruvate translocase, a transfer protein located in mitochondrial membrane.
Pyruvate is then decarboxylated into acetyl-CoA which then takes part in Krebs cycle. It is catalyzed by pyruvate dehydrogenase and releases 1 NADH per pyruvate molecule involved.
Krebs cycle is a set of chemical reactions which completely metabolize acetyl-CoA and produces 1 GTP, 3 NADH, and 1 FADH₂ per molecule of pyruvate. 2 molecules of CO₂ are released as a byproduct.
Overall, NADH and FADH₂ enters electron transport chain which ultimately results into the production of ATP with the help of chemiosmosis.
