As food travels through the digestive system, it is exposed to a variety of pH levels. The stomach has a pH of 2 due to the presence of hydrochloric acid (HCI) and the small intestine has a pH ranging from 7 to 9. HCl converts pepsinogen into pepsin, an enzyme that digests proteins in the stomach. Which of the following most likely happens to pepsin as it enters the small intestine?
a) It begins to replicate
b) Its shape changes to enguf large proteins
c) Its activity increases to digest more proteins
d) It denatures
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As food travels through the digestive system, it is exposed to a variety of pH levels. The stomach h...
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