Which Scottish physician and researcher co-discovered the insulin used to treat diabetes?

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Multiple Choice

Which Scottish physician and researcher co-discovered the insulin used to treat diabetes?

Insulin’s discovery in 1921 came from Frederick Banting and Charles Best working in Toronto, with John Macleod, a Scottish physician, providing essential supervision, a lab, and scientific guidance. Macleod’s role helped turn their observation into a working treatment, and the insulin was later purified for use by James Collip. This combination—Banting and Best’s discovery plus Macleod’s oversight—is why Macleod is identified as the co-discoverer. The other names are notable for different achievements: Crick helped reveal the structure of DNA, Watson-Watt pioneered radar, and Baird invented early television, none of which relate to insulin.

Insulin’s discovery in 1921 came from Frederick Banting and Charles Best working in Toronto, with John Macleod, a Scottish physician, providing essential supervision, a lab, and scientific guidance. Macleod’s role helped turn their observation into a working treatment, and the insulin was later purified for use by James Collip. This combination—Banting and Best’s discovery plus Macleod’s oversight—is why Macleod is identified as the co-discoverer. The other names are notable for different achievements: Crick helped reveal the structure of DNA, Watson-Watt pioneered radar, and Baird invented early television, none of which relate to insulin.

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