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Question

Which of the following statements are correct about the function of the acidic environment of the stomach?
(i) Provides defence against bacteria entering the digestive system
(ii) Converts pepsinogen to pepsin
(iii) Assists the breakdown of cells in animal and plant food stuffs

A
ii only
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B
i and ii only
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C
ii and iii only
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D
i, ii, and iii
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Solution

The correct option is A i and ii only
The HCl is secreted by the oxyntic cells in the stomach. The HCl provides the acidic medium in the stomach that is responsible for converting the inactive pepsinogen to the active pepsin. Pepsin is required for protein digestion. The acidic medium provides defence against bacteria entering the digestive system.
Hence, the correct answer is 'i and ii only'

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