Select incorrect statement for capsule and slime layer :

Options

A. made up of polysaccharides and proteins
B. can be highly specific and immunogenic
C. essential for bacterial survival
D. responsible for giving gummy and sticky character to the cell.

Answer

**Step-by-Step Solution:**

1. **Understanding the Terms:**
- The capsule and slime layer are components of the glycocalyx, which is a protective layer found outside the cell wall of bacteria.
- The glycocalyx can be categorized into two types: capsule and slime layer.

2. **Defining Capsule and Slime Layer:**
- **Capsule:** This is a thick, tightly bound layer of glycocalyx that is firmly attached to the bacterial cell wall. It provides protection and helps in evading the immune response.
- **Slime Layer:** This is a thinner, loosely attached layer of glycocalyx that can be easily deformed. It is more flexible and can help in adherence to surfaces.

3. **Composition of Glycocalyx:**
- Glycocalyx is primarily composed of high molecular weight substances, which can include polysaccharides, proteins, or both.

4. **Analyzing the Statements:**
- **Statement 1:** "Made up of polysaccharide and proteins."
- This statement is correct as glycocalyx can consist of both.
- **Statement 2:** "They can be highly specific and immunogenic."
- This statement is also correct as these layers can enhance the virulence of bacteria.
- **Statement 3:** "Essential for bacterial survival."
- This statement is incorrect. While the capsule and slime layer provide advantages, they are not essential for the survival of bacteria.
- **Statement 4:** "They are responsible for giving gummy and sticky character to the cell."
- This statement is correct as these layers contribute to the adhesive properties of bacteria.

5. **Conclusion:**
- The incorrect statement regarding capsule and slime layer is: "Essential for bacterial survival."