Glycocalyx (mucilage sheath) of a bacterial cell may occur in the form of a loose sheath called _________ or it may be thick and tough called ________.

Options

A. capsule, slime layer
B. slime layer, capsule
C. mesosome, capsule
D. mesosome, slime layer

Explanation

To answer the question regarding the forms of glycocalyx in bacterial cells, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding Glycocalyx**: The glycocalyx, also known as the mucilage sheath, is an outer layer found in some bacterial cells. It plays a significant role in protecting the bacteria and aiding in their survival.

2. **Identifying the Forms**: The glycocalyx can exist in two distinct forms:
- A **loose sheath** which is referred to as the **slime layer**.
- A **thick and tough covering** which is known as the **capsule**.

3. **Function of Glycocalyx**: The slime layer is typically gelatinous and serves to protect the bacteria from desiccation (drying out) and helps in evading the immune response. The capsule, being thicker, is often associated with virulent (pathogenic) bacteria and provides additional protection.

4. **Final Answer**: Therefore, the complete answer to the question is:
- The loose sheath is called **slime layer** and the thick and tough covering is called **capsule**.

### Final Answer:
Glycocalyx of a bacterial cell may occur in the form of a loose sheath called **slime layer** or it may be thick and tough called **capsule**.

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