In aerobic respiration, the glucose molecule is completely broken down into carbon dioxide (CO2), water (H2O) and _ energy.C6H12O6 + 6O2 ---> 6CO2 + 6H2O + ?
Correct answer: D. 36 ATP
- A. 2 ATP
- B. 4 ATP
- C. 34 ATP
- D. 36 ATP
Explanation
Respiration is defined as the oxidation of food molecules that release energy in the form of ATP. Aerobic respiration involves the following stages: Glycolysis, Link Reaction, Kreb's Cycle, and Oxidative Phosphorylation.3 NADH2 = 3 ATPs1 FADH2 = 2 ATPsThe 2 NADH2 molecules formed during glycolysis remain in the cytoplasm as the mitochondrial membrane is impermeable to NADH2. They deposit hydrogen ions on the mitochondrial membrane. As a result, hydrogen will be gained by FAD to form 2 FADH2 molecules. When FADH2 gets hydrolysed, 4 ATP molecules are lost. Hence, 40 - 4 = 36 ATP molecules are formed during aerobic respiration.The yield is approximately 29−32 ATP molecules per glucose.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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