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

C It becomes inactive

Explanation:

Enzymes have an ideal pH, at which they best function. Many enzymes cannot function

at all outside their ideal pH range. Pepsin functions best in the extreme acid

environment of the stomach and will, therefore cease to function in the much higher pH

of the small intestine.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above