Which of the following is an example of globular protein ?

Options

A. Myosin
B. Collagen
C. Keratin
D. Haemoglobin

Answer

To determine which of the following is an example of a globular protein, we need to first understand what globular proteins are and then analyze the given options.

### Step-by-Step Solution:

1. **Define Globular Proteins**:
- Globular proteins are proteins that have a spherical shape due to the folding of polypeptide chains. They are typically soluble in water and play various roles in biological processes.

2. **Identify Characteristics**:
- Globular proteins are usually involved in metabolic functions and are soluble in aqueous environments. Examples include enzymes, hormones, and transport proteins.

3. **List the Given Options**:
- The options provided are:
- Myosin
- Collagen
- Keratin
- Hemoglobin

4. **Analyze Each Option**:
- **Myosin**: This is a fibrous protein involved in muscle contraction and is not soluble in water. Therefore, it is not a globular protein.
- **Collagen**: This is a structural protein found in connective tissues and is also fibrous, making it insoluble in water. Thus, it is not a globular protein.
- **Keratin**: This is another fibrous protein found in hair, nails, and skin, and is also insoluble in water. Hence, it is not a globular protein.
- **Hemoglobin**: This is a globular protein that carries oxygen in the blood. It has a spherical shape and is soluble in water.

5. **Conclusion**:
- Among the options provided, **hemoglobin** is the only example of a globular protein.

### Final Answer:
**Hemoglobin** is an example of a globular protein.