Bacteria as pathogens Quiz
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5 questions, one answer each
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1. Which toxin is secreted by living bacteria?
- A. Endotoxin
- B. Exotoxin
- C. Lipopolysaccharide from the cell wall
- D. Tubercle
2. Which type of toxin is made by Salmonella?
- A. An exotoxin secreted as a protein
- B. An enzyme secreted into the gut
- C. An endotoxin in the cell wall
- D. No toxin of any kind
3. How does M. tuberculosis mainly damage the lungs?
- A. By invading and destroying lung tissue
- B. By secreting a powerful exotoxin
- C. By producing endotoxin in the blood
- D. By blocking the airway with a capsule
4. A wound contains S. aureus but the patient shows symptoms in distant organs. What is the best explanation?
- A. The bacteria have all moved to the organs
- B. Endotoxin is released by living cells
- C. The wound is not infected
- D. The exotoxin is carried in the blood
5. Which statement about endotoxins is correct?
- A. They are secreted by living Gram-negative bacteria
- B. They are mostly proteins
- C. They are released when the bacterial cell breaks down
- D. They are made only by Staphylococcus