E. coli is a:
Correct answer: D. All of these
- A. Facultative
- B. Anaerobic
- C. Gram-negative
- D. All of these
Explanation
Escherichia coli (E. coli) is facultative anaerobe. it is anaerobic in the absence of oxygen, and it is also Gram-negative because its cell wall has a thin peptidoglycan layer and an outer membrane. Hence, all the given options are correct.
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