Which of the following pathways would increase its activity level during starvation?

Options

A. Fatty acid degradation
B. Amino acid synthesis
C. Fatty acid synthesis
D. None of these

Explanation

**Step-by-Step Solution:**

1. **Understanding Starvation**: During starvation, the body lacks immediate sources of glucose from food. This condition necessitates alternative energy sources to maintain vital functions, especially for the brain, which relies heavily on glucose.

2. **Role of Fatty Acids**: In the absence of glucose, the body turns to stored fatty acids. These fatty acids are broken down to provide energy.

3. **Conversion of Fatty Acids**: Fatty acids cannot be converted directly into glucose. Instead, they are metabolized into acetyl coenzyme A (acetyl CoA).

4. **Energy Production**: Acetyl CoA plays a crucial role in energy metabolism. It enters the Krebs cycle (also known as the citric acid cycle) to produce ATP, which is the energy currency of the cell.

5. **Conclusion**: Therefore, during starvation, the pathway that increases its activity level is the degradation of fatty acids, leading to the production of acetyl CoA for energy.

**Final Answer**: The pathway that would increase its activity level during starvation is the degradation of fatty acids.

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