In 1921, Banting and Best isolated insulin from the pancreas of:
A
Pig
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B
Calves
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C
Dog
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D
Rabbit
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Solution
The correct option is B Calves Banting and Best first isolated insulin from fetal 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.