`beta`-oxidation occurs in

Options

A. Pea seeds
B. Gram seeds
C. Wheat grains
D. Cotton seeds

Answer

### Step-by-Step Text Solution:

1. **Understanding Beta-Oxidation**:
- Beta-oxidation is a metabolic process that involves the breakdown of fatty acids to produce energy. This process occurs in the mitochondria of cells.

2. **Identifying the Location**:
- Beta-oxidation primarily takes place in the mitochondria of plant cells, where fatty acids are converted into acetyl-CoA, which can then enter the Krebs cycle for further energy production.

3. **Analyzing the Options**:
- The question provides four options: pea seeds, gram seeds, wheat grains, and cotton seeds. We need to determine which of these contains fatty acids that undergo beta-oxidation.

4. **Evaluating Each Option**:
- **Pea Seeds**: Generally contain carbohydrates and proteins, but not significant amounts of fatty acids.
- **Gram Seeds**: Also primarily contain proteins and carbohydrates, with limited fatty acid content.
- **Wheat Grains**: Similar to the above, they are rich in carbohydrates and proteins, with minimal fatty acids.
- **Cotton Seeds**: Known to contain a high amount of fatty acids, including palmitic acid, oleic acid, and linoleic acid.

5. **Conclusion**:
- Since cotton seeds are rich in fatty acids, they are the correct answer. The beta-oxidation of fatty acids in cotton seeds can produce a significant amount of ATP, specifically 131 ATP from palmitic acid.

6. **Final Answer**:
- Therefore, the correct answer is **cotton seeds**.