Proteins those can be easily extracted from the plasma membrane, are :-

Options

A. Transmembrane
B. Integral
C. Peripheral
D. Intrinsic

Answer

### Step-by-Step Solution:

1. **Understanding Plasma Membrane Composition**: The plasma membrane is primarily composed of phospholipids and proteins. It follows the fluid mosaic model proposed by Singer and Nicolson.

2. **Types of Membrane Proteins**: There are two main types of proteins associated with the plasma membrane:
- **Intrinsic (or Integral) Proteins**: These proteins are embedded within the lipid bilayer and are more difficult to extract.
- **Extrinsic (or Peripheral) Proteins**: These proteins are located on the outer or inner surfaces of the membrane and are easier to extract.

3. **Fluid Mosaic Model**: According to this model, the membrane is a mosaic of various proteins floating in or on the fluid lipid bilayer. This arrangement allows for the dynamic nature of the membrane.

4. **Extraction of Proteins**:
- To extract **peripheral proteins**, one can use a salt solution. The ionic interactions that hold these proteins to the membrane can be disrupted by the salt, allowing for easier extraction.
- In contrast, **integral proteins** require detergents to disrupt the hydrophobic interactions that keep them embedded within the lipid bilayer.

5. **Conclusion**: The proteins that can be easily extracted from the plasma membrane are the **peripheral (extrinsic) proteins**.

### Final Answer:
The proteins that can be easily extracted from the plasma membrane are **peripheral proteins**.

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