Compound starch grains are present in

Options

A. Potato
B. Rice
C. Oat
D. All the above.

Answer

**Step-by-Step Solution:**

1. **Understanding Starch Grains:**
- Starch grains are the storage form of carbohydrates in plants. They are primarily composed of amylose and amylopectin, which are polysaccharides made up of glucose units.

2. **Identifying the Options:**
- The options given are:
- A) Potato
- B) Rice
- C) Oat
- D) All of the above

3. **Analyzing Each Option:**
- **Potato:**
- Potatoes are tubers that store starch as their main form of energy. Starch grains in potatoes are oval and eccentric, with sizes ranging from 15 to 100 micrometers.
- **Rice:**
- Rice is a staple food that is rich in carbohydrates, primarily in the form of starch. The starch grains in rice are smaller, typically ranging from 3 to 8 micrometers.
- **Oat:**
- Oats are also a significant source of carbohydrates and contain starch grains. The size of starch grains in oats varies from 5 to 25 micrometers.

4. **Conclusion:**
- Since all three options (potato, rice, and oat) contain starch grains, the correct answer is D) All of the above.

**Final Answer:**
- Compound starch grains are present in **D) All of the above.**

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