Lipids provide approximately how many times more energy per gram than carbohydrates?

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Study for the ELANCO Advanced Animal Science Exam. Enhance your knowledge with flashcards and multiple choice questions, with hints and explanations for each question. Get ready for your exam!

Multiple Choice

Lipids provide approximately how many times more energy per gram than carbohydrates?

Explanation:
Lipids have a higher energy density than carbohydrates because they are more reduced and contain more carbon–hydrogen bonds with less oxygen, so more energy is released when they are oxidized. In nutrition terms, carbohydrates provide about 4 kcal per gram, fats about 9 kcal per gram. 9 divided by 4 is 2.25, so lipids give roughly 2.25 times more energy per gram than carbohydrates. The other options don’t align with these standard energy densities.

Lipids have a higher energy density than carbohydrates because they are more reduced and contain more carbon–hydrogen bonds with less oxygen, so more energy is released when they are oxidized. In nutrition terms, carbohydrates provide about 4 kcal per gram, fats about 9 kcal per gram. 9 divided by 4 is 2.25, so lipids give roughly 2.25 times more energy per gram than carbohydrates. The other options don’t align with these standard energy densities.

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