E. coli and example of entrobacteriace is important for causing diarrheal diseases its size is____________?
Correct answer: C. 1.1-1.5 um (width) 2.0-6.0 um (length)
- A. 0.1-600 um
- B. 100-200 nm
- C. 1.1-1.5 um (width) 2.0-6.0 um (length)
- D. 0.75-1.25 um
Explanation
E. coli is a short rod approximately 1.1-1.5 μm wide and 2.0-6.0 μm long, so option c gives the appropriate bacterial dimensions with units. Students may choose 100-200 nm because bacteria are microscopic, but nanometres describe much smaller structures such as ribosomes, not the whole E. coli 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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