A globular protein is

Options

A. Elastin
B. Keratin
C. Albumin
D. Collagen.

Answer

To determine which of the given options is a globular protein, we can follow these steps:

### Step 1: Understand the definition of globular proteins
Globular proteins are proteins that are roughly spherical in shape. They are typically soluble in water and play various roles in biological processes, such as enzymes, hormones, and transport proteins.

### Step 2: Analyze the options provided
The options given are:
1. Elastin
2. Keratin
3. Albumin
4. Collagen

### Step 3: Identify the characteristics of each protein
- **Elastin**: This is a fibrous protein that provides elasticity to tissues, such as skin and blood vessels.
- **Keratin**: This is also a fibrous protein found in hair, nails, and the outer layer of skin. It provides structural support.
- **Albumin**: This is a globular protein found in egg whites and blood plasma. It is soluble in water and plays a crucial role in maintaining osmotic pressure and transporting substances.
- **Collagen**: This is a fibrous protein that provides strength and structure to connective tissues, such as tendons and ligaments.

### Step 4: Determine the correct answer
Based on the characteristics analyzed, **albumin** is the only globular protein among the options provided. The other three (elastin, keratin, and collagen) are fibrous proteins.

### Conclusion
The correct answer is **albumin**.

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