Aerobic respiration and fermentation have the process of ______ in common which takes place in the ______ (location) of the cell.  During fermentation pyruvate is metabolized to produce _____ or _______    _____, depending on the organism.  There is a net production of _____ (number) ATP molecules per glucose molecule during fermentation.

Aerobic respiration occurs in the presence of oxygen whereas fermentation occurs in the absence of oxygen. Aerobic respiration yields more energy in comparison to fermentation.

In fermentation, glucose is broken down to yield energy in the absence of oxygen. Fermentation begins with glycolysis.

Lactic acid fermentation occurs in Muscle cells where NADH transfers its electrons directly to pyruvate, generating lactate as a byproduct.

Glucose ----------2 Pyruvate --•-----2 lactate.

Ethanol fermentation occurs in yeast wheare NADH donates its electrons to a derivative of pyruvate, producing ethanol.

Glucose ------2 pyruvate ------2 acetaldehyde ----2 ethanol.

In aerobic respiration, glycolysis yields 2 pyruvate. Then in presence of oxygen, pyruvate enters the Krebs cycle which occurs in mitochondria. After that oxidative phosphorylation occurs in mitochondria. Aerobic respiration yields 32 ATP.

Reaction of aerobic respiration is 

Glucose (C₆H₁₂O₆)  + Oxygen 6(O₂) → Carbon-dioxide 6(CO₂)  +  Water 6 (H₂O) + Energy (ATP)