Which type of cell lacks a membrane-bound nucleus?

• A. A prokaryotic cell (e.g., a bacterium)
• B. A eukaryotic plant cell
• C. A eukaryotic fungal cell
• D. A eukaryotic animal cell

Answer: (A)

Verified step by step guidance

1. Understand the difference between prokaryotic and eukaryotic cells: Prokaryotic cells do not have a membrane-bound nucleus, while eukaryotic cells do.
2. Recall that prokaryotic cells include organisms like bacteria and archaea, which have their genetic material free-floating in the cytoplasm.
3. Recognize that eukaryotic cells, such as plant, fungal, and animal cells, have a defined nucleus enclosed by a nuclear membrane.
4. Identify that the question asks for the type of cell lacking a membrane-bound nucleus, which points to prokaryotic cells.
5. Conclude that the correct answer is a prokaryotic cell (e.g., a bacterium) because it lacks a membrane-bound nucleus.