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One molecule of glycerol tristearate (a triglyceride with molecular weight 897.53 Daltons) generates 3 molecules of stearic acid (a fatty acid) and 1 molecule of glycerol. Each molecule of stearic acid undergoes beta-oxidation, Krebs cycle and electron transport chain to yield 135 ATP (theoretical efficiency, same below). Glyceol undergoes metabolism and generates 18 ATP. The total ATP yield for this lipid molecule is then 135 * 3 + 18 = 423 ATP or 0.47 mol ATP/gram. Glucose, with a molecular weight of 180.16, generates only 36 ATP, or 0.20 mol ATP/gram. Since polymeric carbohydrates are simply aggregates of simpler subunits, the efficiency of storage does not improve much more than monosaccharides.

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Q: Why do lipids have more energy per gram than carbohydrates?
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What has more energy lipids or carbohydrates?

lipids contain much more energy then carbohydrates. One gram of lipids create an average of 423 ATP or 0.47 mol ATP/gram. Glucose, with a molecular weight of 180.16, generates only 36 ATP, or 0.20 mol ATP/gram

Why are lipids used for long term energy storage?

Lipids (fats) have 9 calories/gram. Both carbohydrates and proteins only have 4 calories/gram. Thus lipids have more than twice the energy density of carbohydrates and proteins.

Do Lipids contain more caloric energy per gram than carbohydrates or proteins?


What are the advantages of storing energy as carbohydrates and not lipids?

For storing, lipids are much more efficient than carbohydrates. Carbohydrates are much more easily metabolized and only store 4 calories per gram while lipids store 9 calories per gram.

Which macromolecule contains the most energy?

Lipids store more energy per gram than carbohydrates or proteins.

Advantages of storing lipids instead of carbohydrates?

I don't really know what you're asking, but I'll do my best. The body stores both lipids and carbohydrates. Carbohydrates are more readily metabolized, but lipids are far more energy-dense- they can store far more energy per gram.

Which holds more chemical energy a lipid or carbohydrate?

Lipids by far. Lipids or "fats" contain about twice as much energy per gram than carbohydrates. The reason for this is that the function of lipids is to store energy for the body. Carbohydrates however, are for "quick energy".

What produces more energy lipids or carbohydrates?


Do lipids contain more calories per gram than either carbohydrates or proteins?

Lipids contain 9 cal/gram while proteins and carbohydrates each contain 4 cal/gram.

Why do lipids store more energy?

Lipids, as compared with carbohydrates, are much more reduced (i.e., there are many more C-H bonds and far fewer C-OH or C=O bonds).Because of this greater degree of reduction, lipids store more energy per gram than do carbohydrates (nine vs. four, respectively).

Does protein or carbohydrates provide more energy?

Gram for gram, proteins and carbohydrates provide approximately the same amount of energy.

What macromolecule provides more energy lipids or carbohydrates?

Fats contain more energy than both protein and carbohydrates.

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