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Which structural feature is absent in prokaryotic cells?

Answer and explanation

Correct answer: Well-defined nuclear membrane

Correct answer: B, a well-defined nuclear membrane. Prokaryotic cells do not have a membrane-bound nucleus. Their genetic material is present in a nucleoid region, which lies in the cytoplasm and is not surrounded by a nuclear envelope. First, distinguish the two cell types: eukaryotic cells have a true nucleus, while prokaryotic cells do not. A is wrong because the cell membrane is essential and present. B is correct because the nuclear membrane is absent. C is wrong because ribosomes are present and make proteins. D is wrong because many prokaryotes, including bacteria, possess a cell wall. Memory cue: “pro” means an earlier, simpler cell plan; “no true nucleus” is the key distinction.

Related tags

Prokaryotic CellsCell StructureNuclear MembraneNucleoidProkaryotic & Eukaryotic CellsProkaryotic Eukaryotic CellsCell – The Unit Of LifeCell The Unit Of Life

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