Tu Youyou Returns to Old Texts
Written by Studio AM.
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In a search for treatments against malaria, Chinese pharmaceutical researcher Tu Youyou and her team examined both modern screening results and historical medical writings. One plant, sweet wormwood, appeared in old preparations, but early laboratory extracts gave inconsistent results.
Tu reread a historical instruction that described soaking the plant and wringing out its liquid rather than boiling it. She inferred that high heat might damage the active substance. Her team developed a lower-temperature extraction using solvents, separated portions of the extract, and tested them systematically. This process produced a preparation with much more reliable activity in experimental models.
The work did not consist of simply copying an ancient recipe. A historical clue suggested a variable (temperature) that could be examined through controlled comparison. Nor was it a solitary discovery. Researchers gathered texts, identified plants, performed extractions, ran tests, and refined purification across a larger program.
The active compound, later known as artemisinin, became an important basis for malaria treatment. Its history shows two kinds of respect for evidence. Old knowledge was taken seriously enough to revisit, while each interpretation still had to survive laboratory testing. The productive move was neither to accept tradition automatically nor to dismiss it as unscientific, but to turn a textual detail into a testable question.
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Questions
Choose an answer. The explanation appears after you answer.
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Question 1 of 4
What is the main idea of the passage?
The answer is B: Tu Youyou's team transformed a clue from historical practice into controlled extraction tests that helped reveal artemisinin.
The passage centers on the productive link between a textual clue, a temperature hypothesis, systematic work, and team evidence.
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Question 2 of 4
Why did the team try a lower-temperature extraction?
The answer is C: Tu suspected that high heat was damaging the substance responsible for the plant's activity.
The second paragraph directly connects the soaking instruction with Tu's heat-damage inference.
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Question 3 of 4
What does “inconsistent” mean in the first paragraph?
The answer is D: not producing the same reliable result across attempts
The later preparation is described as much more reliable, contrasting with the variable early results.
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Question 4 of 4
What was the active compound later called?
The answer is A: artemisinin
The final paragraph names the compound artemisinin.
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