Question

energy storage in humans
what is the best conclusion based on this data?
blood is a primary location for energy storage.
fat molecules contain more energy - containing bonds than simple sugars.
a gram of glycogen has twice as much energy as a gram of fat.
the human body stores approximately 1,000 kcal of glucose.

Explanation:

• Blood as primary energy storage: Blood glucose has only 40 kcal energy storage and can support life for a few minutes. So blood is not a primary energy - storage location.
• Fat vs simple sugars (glycogen): Fat has 9 kcal per gram and glycogen has 4 kcal per gram. Fat has more energy - containing bonds. Since energy per gram is related to the number of energy - containing bonds (more bonds, more energy released on breakdown), this option is correct.
• Glycogen vs fat energy: Glycogen has 4 kcal per gram and fat has 9 kcal per gram. So a gram of glycogen does not have twice as much energy as a gram of fat.
• Glucose storage: The table shows that free glucose in blood has 40 kcal of energy storage, not 1000 kcal.

Answer:

Fat molecules contain more energy - containing bonds than simple sugars.