Which of the following are not correct regarding plasmalemma?

Options

A. It forms pseudopodia
B. It is semipermeable
C. It appears to be fluid.
D. It is only present in animal.

Explanation

**Step-by-Step Solution:**

1. **Understanding Plasmalemma**: Plasmalemma, also known as the plasma membrane or plasmalembrane, is a vital component of all cells. It serves as a barrier that separates the interior of the cell from the external environment.

2. **Characteristics of Plasmalemma**:
- **Composition**: Plasmalemma is primarily composed of a phospholipid bilayer with embedded proteins. This structure is often referred to as the fluid mosaic model.
- **Permeability**: It is selectively permeable, meaning it allows certain substances to pass while blocking others. This characteristic is essential for maintaining the cell's internal environment.

3. **Evaluating the Options**:
- **Option 1**: "It forms pseudopodia." - This statement is incorrect. Pseudopodia (false feet) are extensions of the cytoplasm found in certain cells like amoeba, but they are not a characteristic of the plasmalemma itself.
- **Option 2**: "It is semi-permeable in nature." - This statement is correct. The plasmalemma is indeed semi-permeable, allowing selective passage of substances.
- **Option 3**: "It appears to be fluid." - This statement is also correct. The fluid mosaic model describes the plasmalemma as having a fluid-like structure due to the movement of proteins within the lipid bilayer.
- **Option 4**: "It is only present in animal cells." - This statement is incorrect. Plasmalemma is present in all cell types, including plant cells and bacteria, not just animal cells.

4. **Conclusion**: The statements that are not correct regarding plasmalemma are:
- It forms pseudopodia.
- It is only present in animal cells.

**Final Answer**: The incorrect statements regarding plasmalemma are:
- It forms pseudopodia.
- It is only present in animal cells.

---