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.

A, C and D are correct; while B is wrong

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A, B and D are correct; while C is wrong

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B, C and D are correct; while A is wrong

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A, B and C are correct; while D is wrong

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Solution

The correct option is A A, B and D are correct; while C is wrong
Gastric lipase can partially compensate for the decrease in production of pancreatic lipase associated with pancreatic dysfunction, giving some means for the body to digest lipids. Limitation of acidic lipases is that they remove only one fatty acid from each triacylglycerol. The free fatty acid can readily cross the epithelial membrane lining the gastrointestinal tract, but the diacylglycerol cannot be transported across. This leaves the acidic lipases less efficient than alkaline lipases.
The digestion of starch (carbohydrate) beings on the buccal cavity by ptyalin enzyme.
Protein digestion begins in the stomach.
Hydrochloric acid, proteins digesting enzymes and mucus are present in the gastric juice.
Therefore, the correct answer is option B.

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Similar questions

Three of the following statements about enzymes are correct and one is wrong. Pick the wrong one.

Which of the following are the correct functions of two components of pancreatic juice trypsin and lipase?
(a) trypsin digests proteins and lipase digests carbohydrates
(b) trypsin digests emulsified fats and lipase digests proteins
(c) trypsin digests starch and lipase digests fats
(d) trypsin digests proteins and lipase digests emulsified fats

Q. Read the following statements (A-D).
(A) The stomach stores the food for

4 - 5

hours.
(B) The food mixes throughly with the acidic intestinal juice.
(C) Trypsinogen is activated by an enzyme enterogastrone, secreted by the intestinal muscosa.
(D) Renin is enzyme found in gastric juice of infants which helps in digestion of milk protein.
How many of the given statements are wrong?

Correct the following statements by deleting one of entries (given in bold).
(a) Goblet cells are Located in the intestinal mucosal epithelium and secrete chymotrypsin/mucus.
(b) Fats are broken down into di-and monoglycerides with the help of amylase/lipases.
(c) Gastric glands of stomach mucosa have oxyntic cell/chief cells which secrete HCl.
(d) Saliva contains enzymes that digest starch/protein

Choose the correct statements regarding the gastric juices.

I. Pepsin converts proteins into peptones partially.

II. Hydrochloric acid kills the germs present in food and regulates pH for digestion in the stomach.

III. Mucus protects the stomach wall from the action of digestive juices.

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