Which of the following structure is not present in all the bacteria_____________?
Correct answer: D. Capsule
- A. Cell membrane
- B. Chromatin bodies
- C. Ribosomes
- D. Capsule
Explanation
All bacteria possess a plasma membrane, genetic material in a chromatin-like nucleoid, and ribosomes, but a capsule is present only in some species. Students may choose the cell membrane because bacterial diagrams differ in how it is drawn, but it is an essential structure of every bacterial cell.
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About Prokaryotic and Eukaryotic Cells
Prokaryotic cells lack a membrane-bound nucleus and complex membrane-bound organelles, whereas eukaryotic cells contain a nucleus, specialized organelles and a cytoskeleton. Comparisons include DNA organization, ribosomes, cell walls, size, division and examples such as bacteria, archaea, protists, fungi, plants and animals.
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