Pepsin and trypsin are two of the digestive enzymes that break down protein. A group of students studied the pH requirements of these enzymes. The graph below shows the results.
Digesove Enzyme
m
Most
The students found that pepsin functions best in an acid environment and trypsin functions best in a neutral environment. Based on their
observations, pepsin most likely alds in digestion in which part of the human body?
(5.9 points)
A. Pancreas
B. Intestines
C. Mouth
ID. Stomach

D. Stomach

Explanation:

One of the most important digestive enzymes that aids digestion by breaking down of ingested food, most especially proteins is pepsin, which is usually referred to as "stomach enzyme".

Pepsin is found secreted in the stomach.

The pH of the stomach is usually low, between 1.5 to 2 (acidic). This acidic environment of the stomach actually favors this stomach enzyme, as it activated the pepsin to perform it's function.

Based on the observations made by the students, it can be concluded that pepsin aids digestion most in the stomach. It's pH requirement to function optimally matches with the pH of the environment of the stomach.

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