Which of the following structures is NOT found in bacteria?

• A. Plasma membrane
• B. Nucleus
• C. Cell wall
• D. Ribosome

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the basic cellular structures found in bacteria. Bacteria are prokaryotic organisms, meaning they lack a true nucleus and membrane-bound organelles.
2. Step 2: Review the given options: Plasma membrane, Nucleus, Cell wall, and Ribosome. Consider which of these are typical components of bacterial cells.
3. Step 3: Recall that bacteria have a plasma membrane that controls the movement of substances in and out of the cell.
4. Step 4: Recognize that bacteria have a cell wall, which provides structural support and protection, and ribosomes, which are responsible for protein synthesis.
5. Step 5: Identify that the nucleus is a membrane-bound organelle found only in eukaryotic cells, not in bacteria, making it the structure NOT found in bacteria.