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Question

Which of the following is incorrect regarding the given digestion and absorption of protein?

A
The breakdown of proteins to peptides is catalyzed by pepsin in the stomach and by the pancreatic enzymes trypsin and chymotrypsin in the small intestine.
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B
Peptides are broken dawn into amino acids by pancreatic carboxypeptidase and intestinal aminopeptidase.
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C
Small peptides consisting of two or three amino acids can diffuse through epithelial cell and broken down into carbon dioxide and ammonia which are released into the blood.
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D
None of these
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Solution

The correct option is C Small peptides consisting of two or three amino acids can diffuse through epithelial cell and broken down into carbon dioxide and ammonia which are released into the blood.
Small peptides can be digested into small intestinal epithelial cells by cotransport with hydrogen ions, they are digested into amino acids by cytoplasmic peptidases.
So, the correct option is 'Small peptides consisting of two or three amino acids can diffuse through the epithelial cell and broken down into carbon dioxide and ammonia which are released into the blood.'
So the correct option is C.

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