Proteins are broken down into amino acids completely in

Buccal cavity

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Stomach

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Intestine

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Rectum

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Solution

The correct option is C Intestine
Once a protein source reaches your stomach, hydrochloric acid, and enzymes called proteases to break it down into smaller chains of amino acids.
Amino acids are joined together by peptides, which are broken by proteases.
Digestion of protein is completed in the small intestine by the pancreatic enzymes trypsin, chymotrypsin, and carboxypeptidase. Hence, Proteins are broken down into amino acids completely in Intestine.
So, the correct answer is 'Intestine'.

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Similar questions

Q. Proteins are broken down into amino acids in ______________.

If the saliva is lacking in salivary amylase, then which of the following processes taking place in the buccal cavity will be affected ?.
(a) proteins breaking down into amino acids
(b) starch breaking down into sugars
(c) fats breaking down into fatty acids and glycerol
(d) intestinal layer breaking down leading to ulcers

Q. Pick out the correct and the wrong statement.
A. The digestion of starch (carbohydrate) beings on the buccal cavity by ptyalin enzyme.
B. Protein digestion begins in the stomach.
C. Gastric lipase enzyme completely breaks down the lipids.
D. Hydrochloric acid, proteins digesting enzymes and mucus are present in the gastric juice.

Q. Proteins are digested into amino acids and fats into fatty acids. Which one of the following organs is responsible for absorption of fatty acids and amino acids?

Q. Trypsin digests proteins into amino acids.

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