Which statement about prokaryotic organisms is true?

• A. They possess membrane-bound organelles
• B. They are unicellular and lack membrane-bound organelles
• C. They are always multicellular
• D. They all form biofilms

Answer: (B)

Prokaryotic cells are organized without membrane-bound compartments. They lack a true nucleus and other membrane-delimited organelles like mitochondria or chloroplasts, which distinguishes them from most eukaryotic cells. This structural setup aligns with the typical lifestyle of prokaryotes as single-celled organisms. While many can live in communities or form biofilms, that behavior is not universal and does not change their basic unicellular nature. Conversely, multicellularity is not a defining feature of prokaryotes.