BIOLOGY
ENZYMES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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5
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2
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7
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9
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Detailed explanation-1: -Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach. A low pH (1.5 to 2) activates pepsin.
Detailed explanation-2: -Pepsin is an aspartic protease that acts in food digestion in the mammal stomach. An optimal pH of around 2 allows pepsin to operate in its natural acidic environment, while at neutral pH the protein is denatured.
Detailed explanation-3: -Pepsin works in the highly acidic conditions of the stomach. It has an optimum pH of about 1.5. On the other hand, trypsin works in the small intestine, parts of which have a pH of around 7.5. Trypsin’s optimum pH is about 8.
Detailed explanation-4: -It is a strong acid produced by the parietal cells in the corpus generating a gastric pH of 2-3[1]. Activation of pepsin and absorption of nutrients relies on an acidic pH in the stomach.
Detailed explanation-5: -Pepsin is a proteolytic enzyme that is produced by specialized cells in the stomach called chief cells. It is a part of gastric juice and aids in digestion of food. Pepsin is active only in the acidic environment inside the stomach (pH 1.5-2.5), and it breaks down the large polypeptides into smaller peptide fragments.