the center of starch grain is called hilum it is made up of

Options

A. protein
B. Carbohydrate
C. fat
D. Nitrogen

Answer

To answer the question about what the center of a starch grain, known as the hilum, is made up of, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Starch Grains**: Starch grains are composed of two main polysaccharides, amylose and amylopectin, which are carbohydrates. The hilum is a specific part of the starch grain.

2. **Identifying the Hilum**: The hilum is the central part of the starch grain where layers of starch molecules are deposited. It serves as the point from which the starch granule grows.

3. **Composition of the Hilum**: The question asks what the hilum is made up of. Based on the information, the hilum is primarily made up of proteins that are deposited around it.

4. **Options Analysis**: The options given were protein, carbohydrate, fat, and nitrogen. Since the hilum is associated with the deposition of proteins, the correct answer is protein.

5. **Conclusion**: Therefore, the center of the starch grain, known as the hilum, is made up of protein.

### Final Answer:
The hilum of a starch grain is made up of **protein**.

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