BIOLOGY
ENZYMES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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more than 7
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7
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less than 3
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between 5 and 8
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Detailed explanation-1: -The parietal cells in the stomach lining release hydrochloric acid, which lowers the stomach’s pH. Pepsin is activated by a low pH (1.5 to 2). Pepsin works best at a pH of 1.8, which is very acidic.
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: -The optimum pH for vertebrate pepsin activity lies between 1 and 2, which is acidic but within the normal pH range observed in the stomach following stimulation of acid secretion. Pepsin is inactive above a pH of about 4.5.
Detailed explanation-4: -Pepsin has an optimal activity temperature of 37°C and a pH of 1.6–2.5 depending on the substrate.
Detailed explanation-5: -Pepsin benefits digestion by breaking down each protein (via enzyme activity) into a smaller peptide or amino acid. This allows the nutrients that the food proteins contain to be more readily absorbed and assimilated by the small intestine.