A person who is eating rice .His food contains

Options

A. Cellulose
B. Starch
C. Lactose
D. protein

Answer

To answer the question about what components are present in the food of a person eating rice, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Main Component of Rice**:
- Rice is primarily composed of carbohydrates. The main type of carbohydrate found in rice is starch.

2. **Understand the Nature of Starch**:
- Starch is a polysaccharide, which means it is a complex carbohydrate made up of many glucose units. It serves as a storage form of energy in plants.

3. **Recognize the Structure of Starch**:
- Starch grains, which are found in rice, typically have an oval or round shape and can be categorized into simple or complex starch grains.

4. **Digestion of Starch**:
- When a person eats rice, the digestion of starch begins in the mouth. Saliva contains enzymes that start breaking down starch into simpler sugars. Approximately 30% of the starch is converted into maltose and limit dextrins in the mouth.

5. **Further Digestion in the Small Intestine**:
- The remaining 70% of the starch is broken down by pancreatic juice and intestinal juice in the small intestine, completing the digestion process.

6. **Conclusion**:
- Therefore, the main component in the food of a person eating rice is starch, which is a carbohydrate.

### Final Answer:
The food of a person eating rice contains starch (a carbohydrate).

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