Which of the following gives maximum energy in metabolic process?

Options

A. Proteins
B. Nucleic acids
C. Fats
D. Carbohydrates

Answer

To determine which biomolecule provides the maximum energy in a metabolic process, we need to analyze the calorific values of the given options: proteins, nucleic acids, fats, and carbohydrates.

### Step-by-Step Solution:

1. **Understanding Calorific Value**:
The calorific value indicates the amount of energy (in calories) that a biomolecule provides per gram when metabolized.

2. **Calorific Value of Proteins**:
- Proteins provide approximately **4 calories per gram**.

3. **Calorific Value of Nucleic Acids**:
- Nucleic acids have an **almost negligible calorific value**, meaning they do not contribute significantly to energy production.

4. **Calorific Value of Fats**:
- Fats provide the highest calorific value of **9 calories per gram**.

5. **Calorific Value of Carbohydrates**:
- Carbohydrates also provide about **4 calories per gram**.

6. **Comparing the Values**:
- Now, we compare the calorific values:
- Proteins: 4 calories/gram
- Nucleic Acids: negligible
- Fats: 9 calories/gram
- Carbohydrates: 4 calories/gram

7. **Conclusion**:
- Among the options, **fats** have the highest calorific value at 9 calories per gram. Therefore, fats provide the maximum energy in metabolic processes.

### Final Answer:
**Fats** give the maximum energy in metabolic processes.

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