Glyoxysome helps in

Options

A. amino acid metabolism
B. photorespiration
C. beta-oxidation/digestion of fats
D. all of the above

Answer

### Step-by-Step Solution:

1. **Identify the Function of Glyoxysomes**:
Glyoxysomes are specialized organelles that play a critical role in the metabolism of fatty acids and the conversion of fats into carbohydrates.

2. **Location of Glyoxysomes**:
Glyoxysomes are primarily found in plants, particularly in the fat storage tissues of germinating seeds, such as peanuts and soybeans. They are also present in some filamentous fungi.

3. **Key Processes Involving Glyoxysomes**:
- **Fatty Acid Oxidation**: Glyoxysomes are involved in the breakdown of fatty acids, which is crucial for energy production.
- **Glyoxylate Cycle**: This cycle allows the conversion of fatty acids into carbohydrates, which is essential for germinating seeds that rely on stored fats for energy.
- **Gluconeogenesis**: Glyoxysomes facilitate the formation of glucose from non-carbohydrate sources, including fats.

4. **Enzymes Present in Glyoxysomes**:
The functioning of glyoxysomes relies on specific enzymes, including:
- **Citrate Synthase**: Involved in the initial steps of the glyoxylate cycle.
- **Isocitrate Lyase**: Plays a role in the conversion of isocitrate to succinate and glyoxylate.
- **Malate Synthase**: Catalyzes the synthesis of malate from glyoxylate and acetyl-CoA.

5. **Conclusion**:
Based on the functions and processes associated with glyoxysomes, they are primarily involved in:
- Beta oxidation (digestion of fats)
- Glyoxylate cycle
- Gluconeogenesis

Thus, the correct answer to the question "Glyoxysome helps in" is that they assist in the digestion of fats and related processes.