Lipid molecules can store double amount of energy as compared to same amount of carbohydrate because of high number of__________________?

Correct answer: B. C-H bonds

  • A. C-C bonds
  • B. C-H bonds
  • C. C-N bonds
  • D. C-O bonds

Explanation

Lipids contain many reduced C-H bonds, and oxidation of these bonds releases substantial energy; this is why fats yield about twice as much energy per gram as carbohydrates. Students may choose C-C bonds because carbon chains are prominent in lipids, but the greater energy yield mainly reflects the abundance of hydrogen and C-H bonds.

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