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Question

In 1921, Banting and Best isolated insulin from the pancreas of ___.

A
pigs
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B
calves
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C
dogs
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D
rabbits
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Solution

The correct option is B calves
Banting and Best first isolated insulin from calves. Later on, pork and cows became the two major source of insulin. This was at the time when genetic engineering was yet to be developed and insulin for humans was extracted from animal sources. Insulin extracted this way was extremely expensive and the quantity was very low.

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