Another substance of the category of glucose, sucrose and maltose is -

Options

A. Myoglobin
B. Starch
C. Amino acids
D. Haemoglobin

Answer

To solve the question, "Another substance of the category of glucose, sucrose, and maltose is -", we will analyze the options provided: myoglobin, starch, amino acid, or hemoglobin.

### Step-by-Step Solution:

1. **Identify the Category of Given Substances**:
- Glucose, sucrose, and maltose are all carbohydrates.
- Glucose is a monosaccharide, sucrose is a disaccharide, and maltose is also a disaccharide.

2. **Understand Carbohydrates**:
- Carbohydrates are organic compounds that are essential nutrients for the body.
- They primarily provide energy through metabolism.

3. **Analyze Each Option**:
- **Myoglobin**: This is a protein that contains iron (Fe) and is not a carbohydrate. Therefore, it cannot be the answer.
- **Amino Acid**: Amino acids are the building blocks of proteins and are not carbohydrates. Hence, this option is also incorrect.
- **Hemoglobin**: Like myoglobin, hemoglobin is a protein responsible for carrying oxygen in the blood and is not a carbohydrate. Thus, this option is incorrect as well.
- **Starch**: Starch is a polysaccharide, which is a type of carbohydrate. It is made up of many glucose units and is used by plants for energy storage.

4. **Conclusion**:
- Since starch is a carbohydrate and fits into the same category as glucose, sucrose, and maltose, it is the correct answer.

### Final Answer:
**Starch** is another substance of the category of glucose, sucrose, and maltose.

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