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The table shows the energy that is stored in three types of organic molecules.

Energy Storage in Humans
Free glucose in blood has 4 kilocalories per gram, 40 kilocalories of energy storage, and a few minutes of life support time. Glycogen has 4 kilocalories per gram, 600 to 1600 kilocalories of energy storage, and 1 day of life support time. Lipids have 9 kilocalories per gram, 100,000 kilocalories of energy storage, and 30 to 40 days of life support time.

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.