Question

Which of the following structures surrounds the bacterial cell's cytoplasm and regulates the flow of substances in and out of the cell?

• A. Cell wall
• B. Cell capsule
• C. Cell membrane
• D. Cell inner membrane

Hint:

Cell membrane: selectively permeable.
Cell wall: provides structure.
Capsule: protection from immune system.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Bacterial cells have various structures.
Each structure has a specific function.

Step 2: Key Formula or Approach:
No specific formula.
Need to know the functions of bacterial structures.

Step 3: Detailed Explanation:
The cell membrane (plasma membrane) surrounds the cytoplasm.
It regulates the flow of substances in and out of the cell.
The cell wall provides structural support.
The capsule is a protective layer outside the cell wall.
Thus, the cell membrane regulates substance flow.

Step 4: Final Answer:
The cell membrane regulates the flow of substances in and out of the cell.
Hence, the correct option is (C).