ISEE Reading Question 340: Answer and Explanation

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Question: 340

3. According to the passage, which of the following are components used in vaccine development?

I. inactivated toxins

II. weakened microbes

III. purified proteins

  • A. I only
  • B. II only
  • C. I and II only
  • D. I, II, and III

Correct Answer: D

Explanation:

D is correct. As stated in the last paragraph, “Weakened microbes, killed microbes, inactivated toxins, and purified proteins or polysaccharides derived from microbes are the most common components used in vaccine development strategies.”

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