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What percentage of the energy stored in glucose do humans recover by cellular respiration?

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  • Energy is generated by glyolysis and aerobic respiration which contributes to approximately 252kcal. This is only 37% of total energy of glucose i.e 686kcal/mol.
  • According to the second law of thermodynamics all of the energy cannot be converted into work done i.e most of the energy is lost in the form of heat.
  • So, there 63% of the energy present in glucose is lost in the form of heat and 37% of the total energy is used for cellular respiration












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