Fat has two components, glycerol and fatty acids. They enter common pathway of respiration as

Options

A. DHAP and ketoglutarate
B. Di-HAP and acetyl CoA
C. Glycolic acid and acetyl CoA
D. OAA and Glyceric acid

Answer

To answer the question regarding how fat, which consists of glycerol and fatty acids, enters the common pathway of respiration, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Components of Fat**:
- Fat is made up of two main components: glycerol and fatty acids.

2. **Identifying the Common Pathway of Respiration**:
- The common pathway of respiration where these components enter is glycolysis. Glycolysis is the metabolic pathway that converts glucose into pyruvate, generating ATP in the process.

3. **Role of Glycerol in Glycolysis**:
- Glycerol can be converted into dihydroxyacetone phosphate (DHAP), which is an intermediate in glycolysis. This conversion allows glycerol to enter the glycolytic pathway.

4. **Role of Fatty Acids in Respiration**:
- Fatty acids undergo beta-oxidation to form acetyl coenzyme A (acetyl CoA). Acetyl CoA is a key molecule that enters the citric acid cycle (Krebs cycle) for further energy production.

5. **Combining the Components**:
- Therefore, glycerol enters as DHAP and fatty acids enter as acetyl CoA.

6. **Conclusion**:
- The correct answer to the question is that fats enter the common pathway of respiration as dihydroxyacetone phosphate (DHAP) and acetyl coenzyme A.

### Final Answer:
**Fat has two components, glycerol and fatty acids. They enter the common pathway of respiration as dihydroxyacetone phosphate (DHAP) and acetyl coenzyme A.**

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