A Hypothetical Bacterium Swims Among Human Intestinal Contents Until It

question 59

Multiple Choice

A hypothetical bacterium swims among human intestinal contents until it finds a suitable location on the intestinal lining. It adheres to the intestinal lining using a feature that also protects it from phagocytes, bacteriophages, and dehydration. Faecal matter from a human in whose intestine this bacterium lives can spread the bacterium, even after being mixed with water and boiled. The bacterium is not susceptible to the penicillin family of antibiotics. It contains no plasmids and relatively little peptidoglycan.
-This bacterium's ability to survive in a human who is taking penicillin pills may be due to the presence of ________.

• A) gram-negative cell wall
• B) peptidoglycan in the cell wall
• C) lipopolysaccharides in the cytoplasm
• D) long polypeptides in the cell wall

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