Insulin used for diabetes was earlier extracted from pancreas of slaughtered cattle and pigs. Insulin from an animal source, though caused

Assertion: Insulin used in diabetes was earlier extracted from pancreas of slaughtered cattle and pigs Reason: Insulin from an animla source caused some patients to develop allergy or other types of reactions to the foreign protein

In earlier insulin used for diabetes was extracted from pancreas of which animals ?

List the disadvantages of insulin obtained from the pancreas of slaughtered cows and pigs.

Quinine used in malarial disease is extracted from