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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