The first site of protein digestion is

Gullet

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Stomach

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Small intestine

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Oral cavity

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Solution

The correct option is C Stomach
Proteins are first broken down in the stomach by pepsin and proteases into peptides in the acidic condition. In the duodenum, the pancreatic enzyme trypsin continues the conversion of the polypeptides into dipeptides and tripeptides. Further along, the small intestine reduces the proteins to single amino acids.

Suggest Corrections

	List I		List II
A	Pancreas	1	This organ secretes the chemical enzymes of amylase, protease and lipase.
B	Rectum	2	This is a storage site for faeces before being egested from the body.
C	Oesophagus	3	The structure where mechanical digestion of food first occurs.
D	Oral cavity	4	This tube structure transports food from the oral cavity to the stomach.