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Solution


Q.

Where are proteins first digested in the alimentary canal

1 Small intestine  
2 Oesophagus  
3 Stomach  
4 Mouth  

Ans.

(3)

Proteins are first broken down in the stomach. Pepsinogen is released by peptic cells in the stomach. Pepsinogen is a proenzyme which is converted into active pepsin. Pepsin breaks down proteins into smaller polypeptides.