In bacterium, permease is located in

Options

A. The cell wall
B. The cell membrane
C. The ribosomes
D. The cytoplasm

Answer

**Step-by-Step Solution:**

1. **Understanding Permease**: Permease is a type of enzyme that functions as a membrane transport protein. It facilitates the movement of specific molecules across the cell membrane.

2. **Identifying Locations**: The question provides four possible locations for permease in a bacterium:
- Cell wall
- Cell membrane
- Ribosome
- Cytoplasm

3. **Analyzing Each Option**:
- **Cell Wall**: This structure provides support and protection but does not actively transport molecules.
- **Cell Membrane**: This is a lipid bilayer that regulates the entry and exit of substances in and out of the cell. It is the primary location for transport proteins like permease.
- **Ribosome**: Ribosomes are involved in protein synthesis, not in the transport of molecules.
- **Cytoplasm**: This is the fluid inside the cell where various cellular processes occur, but it is not a location for permease.

4. **Conclusion**: Since permease functions as a transport protein and is responsible for the movement of specific molecules, it is located in the cell membrane of the bacterium.

5. **Final Answer**: Therefore, in a bacterium, permease is located in the **cell membrane**.

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