Which of the following statements is not true for plasma membrane?

Options

A. Lipid is present as a bilayer in it
B. Proteins are present integrated as well as loosely associated with the lipid bilayer
C. Carbohydrate is never found in it
D. It is present both in plant and animal cells

Explanation

To determine which statement is not true for the plasma membrane, let's analyze each option provided:

1. **Lipid is present as a bilayer in it.**
- The plasma membrane is primarily composed of a phospholipid bilayer, which is a fundamental characteristic of its structure. This statement is true.

2. **Proteins are present integrated as well as loosely associated with the lipid bilayer.**
- The plasma membrane contains both integral proteins (which are embedded within the lipid bilayer) and peripheral proteins (which are loosely attached to the surface). This statement is also true.

3. **Carbohydrate is never found in it.**
- Carbohydrates are indeed found in the plasma membrane. They are often attached to proteins (glycoproteins) and lipids (glycolipids), playing important roles in cell recognition and signaling. This statement is false.

4. **It is present both in plants and animals.**
- The plasma membrane is present in all living cells, including both plant and animal cells. This statement is true.

Based on the analysis, the statement that is not true for the plasma membrane is: **"Carbohydrate is never found in it."**

### Summary of Steps:
1. Analyze the first statement about lipid bilayer - true.
2. Analyze the second statement about proteins - true.
3. Analyze the third statement about carbohydrates - false.
4. Analyze the fourth statement about presence in plants and animals - true.
5. Conclude that the false statement is about carbohydrates.