When were bacteriophages discovered by Twort?
Correct answer: A. 1915
- A. 1915
- B. 1920
- C. 1910
- D. 1820
Explanation
Bacteriophages were first discovered by Frederick W. Twort in 1915. While working with Staphylococcus colonies, he noticed that some of them suddenly became transparent and failed to grow. Twort suggested that this was caused by a "filterable virus" capable of destroying bacteria, although he was uncertain and did not pursue the finding further.
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