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A-Level Biology OCR A

Energy Lipids Atp Explain Difference Relative Values Carbs

Lipids yield roughly twice the energy of carbohydrates and proteins due to their higher proportion of C-H bonds, while proteins require an initial ATP investment for deamination.

Lipids yield roughly twice the energy of carbohydrates and proteins due to their higher proportion of C-H bonds, while proteins require an initial ATP investment for deamination.

Front Explain the difference in relative energy values between carbs, lipids and proteins.
Back Energy value differences:
  • Proteins are roughly equivalent to carbohydrates but require deamination & conversion to pyruvate, requiring ATP - net production reduced
  • Lipids store and release about twice as much energy as carbs/proteins because greater proportion of C-H bonds - produce much more ATP in respiration

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