Which of the following structure primarily helps in attachment of bacteria on various surfaces____________?
Correct answer: B. Pili
- A. Flagella
- B. Pili
- C. Both of these
- D. None of these
Explanation
Pili, especially short fimbriae, help bacteria attach to host cells and other surfaces by means of specific surface-binding proteins. Students may choose flagella because they are prominent external structures, but flagella primarily provide motility rather than firm attachment.
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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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