Answered

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

Energy Storage in Humans

\begin{tabular}{|c|c|c|c|}
\hline
& kcal per Gram & Energy Storage (kcal) & Life Support Time \\
\hline
\begin{tabular}{l}
Free Glucose \\
in Blood
\end{tabular} & 4 & 40 & Few minutes \\
\hline
Glycogen & 4 & [tex]$600-1600$[/tex] & 1 day \\
\hline
Lipids (Fats) & 9 & 100,000 & [tex]$30-40$[/tex] days \\
\hline
\end{tabular}

What is the best conclusion based on this data?

A. Blood is a primary location for energy storage.
B. Fat molecules contain more energy-containing bonds than simple sugars.
C. A gram of glycogen has thrice as much energy as a gram of fat.



Answer :

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.