Let's carefully analyze the information provided in the table to draw the best conclusions.
### Understanding the Values
1. Free Glucose in Blood:
- Kcal per Gram: 4
- Energy Storage (kcal): 40
- Life Support Time: Few minutes
2. Glycogen:
- Kcal per Gram: 4
- Energy Storage (kcal): 600-1600
- Life Support Time: 1 day
3. Lipids (Fats):
- Kcal per Gram: 9
- Energy Storage (kcal): 100,000
- Life Support Time: 30-40 days
### Drawing Conclusions
1. Blood is not a primary location for energy storage.
- Explanation: Blood only stores a small amount of energy (40 kcal) and can support life for just a few minutes. Compared to glycogen and lipids, these values are quite low. Thus, blood is not a primary energy storage site.
2. Fat molecules contain more energy-containing bonds than simple sugars.
- Explanation: A gram of lipids (fats) has 9 kcal, while a gram of glucose or glycogen has only 4 kcal. This indicates that lipids have more energy-containing bonds compared to simple sugars like glucose and glycogen.
3. A gram of glycogen has less energy than a gram of fat.
- Explanation: From the kcal per gram values, we see that:
- Glycogen: 4 kcal per gram
- Fat: 9 kcal per gram
- Therefore, a gram of glycogen stores less energy than a gram of fat.
### Conclusion
The best conclusions that can be drawn from the data are:
1. Blood is not a primary location for energy storage.
2. Fat molecules contain more energy-containing bonds than simple sugars.
3. A gram of glycogen has less energy than a gram of fat.
These conclusions accurately reflect the values provided in the table and correctly interpret the energy storage capacities of glucose, glycogen, and lipids.
