60% of respiration in liver cells is performed through

Options

A. Phosphogluconate shunt
B. Glycolysis
C. Anaerobic respiration
D. Common pathway.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which process accounts for 60% of respiration in liver cells. We have four options to consider: phosphogluconate shunt, glycolysis, anaerobic respiration, and common pathway.

2. **Analyzing the Options**:
- **Phosphogluconate Shunt**: Also known as the Pentose Phosphate Pathway (PPP) or Hexose Monophosphate Shunt, this pathway is crucial for generating NADPH and ribose-5-phosphate.
- **Glycolysis**: This is the process of breaking down glucose to produce energy, but it is not the primary pathway for respiration in liver cells.
- **Anaerobic Respiration**: This occurs in the absence of oxygen and is not the main pathway in liver cells, which primarily utilize aerobic processes.
- **Common Pathway**: This term is vague and does not specifically refer to a recognized metabolic pathway in the context of liver respiration.

3. **Identifying the Correct Answer**: The phosphogluconate shunt (PPP) is responsible for a significant portion of respiration in liver cells, specifically 60%. It generates essential molecules such as NADPH and ribose-5-phosphate, which are vital for various biosynthetic processes.

4. **Conclusion**: The correct answer to the question is the **phosphogluconate shunt**.

**Final Answer**: The correct option is **phosphogluconate shunt**.

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