How many molecules of ATP are obtained by the respiration of one molecule of glucose?

2

The correct answer is Option (4) -2

 • 2 molecules of ATP are obtained by the anaerobic respiration of one molecule of glucose.

• Respiration is a glucose degradation mechanism with the aid of molecular oxygen to generate ATP. • It requires both glycolysis and phosphorylation.

• Glycolysis is the first step of glucose degradation that occurs in the absence of oxygen and transforms one glucose molecule into two pyruvate molecules.

• During this cycle, 4 ATP molecules are generated and 2 ATP molecules are consumed.