Plant-derived antimicrobials and drug testing Quiz
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5 questions, one answer each
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1. Which stage of drug testing involves a small number of healthy volunteers?
- A. Phase 1
- B. Pre-clinical
- C. Phase 2
- D. Phase 3
2. What is the purpose of a placebo?
- A. To make the drug work better
- B. To show whether the improvement is due to the drug and not to the patient's expectation
- C. To kill bacteria
- D. To make the trial single-blind
3. A clear zone around a disc has a diameter of 16 mm. What is its area, to 2 significant figures?
- A. 50 mm²
- B. 100 mm²
- C. 200 mm²
- D. 800 mm²
4. Why is a disc of sterile water included in an antimicrobial investigation?
- A. To act as a positive control
- B. To feed the bacteria
- C. To test the extract at a lower concentration
- D. To show that the paper and water do not kill the bacteria
5. Which of these was a weakness of Withering's testing of digitalis soup?
- A. He used a large number of patients with a control group
- B. He kept records of the results
- C. The dose varied and there was no control group
- D. The patients did not know what they were given