Which of the following features are found in nearly all eukaryotic cells?

• A. Circular DNA
• B. Nucleoid region
• C. Membrane-bound nucleus
• D. Peptidoglycan cell wall

Answer: (C)

Verified step by step guidance

1. Understand the key differences between prokaryotic and eukaryotic cells. Eukaryotic cells are characterized by having membrane-bound organelles, including a nucleus, while prokaryotic cells lack these features.
2. Analyze the options provided: Circular DNA and a nucleoid region are features typically found in prokaryotic cells, not eukaryotic cells. Circular DNA is common in prokaryotes, and the nucleoid region is where their genetic material is located.
3. Consider the feature 'Membrane-bound nucleus.' This is a defining characteristic of eukaryotic cells, as their DNA is enclosed within a nuclear membrane, forming a distinct nucleus.
4. Evaluate the feature 'Peptidoglycan cell wall.' Peptidoglycan is a structural component of the cell walls of bacteria (prokaryotes) and is not found in eukaryotic cells. Some eukaryotic cells, like plant cells, have cell walls, but these are made of cellulose, not peptidoglycan.
5. Conclude that the correct answer is 'Membrane-bound nucleus,' as it is a feature found in nearly all eukaryotic cells and distinguishes them from prokaryotic cells.