Question

Which of the following best predicts how the structure and function of pepsin will change as it enters the small intestine?

1) The structure and function of pepsin will remain the same.
2) The structure of pepsin will change, but its function will remain the same.
3) The structure and function of pepsin will change.
4) The structure of pepsin will remain the same, but its function will change.

Answer 1

Pepsin's structure and function will change as it enters the small intestine due to the change in pH.

Step-by-step explanation:

Pepsin is an enzyme that helps digest protein in the stomach. Its structure and function are optimized for the acidic environment of the stomach. However, as pepsin enters the small intestine, the pH becomes more basic. This change in pH will denature and inactivate pepsin, altering its structure and function. Therefore, the correct answer is option 3) The structure and function of pepsin will change.