Question

1. which of the following digestive enzymes is correctly matched with its optimum ph? a. trypsin b. lipase c. amylase d. pepsin

Explanation:

• Trypsin: It is an enzyme that functions optimally in the small intestine where the pH is around 8 (alkaline). The table shows trypsin's optimum pH as 8 which is correct.
• Lipase: Optimum pH for lipase is around 8 (not 3). Lipase works in the small intestine (alkaline environment).
• Amylase: Salivary amylase has an optimum pH close to neutral (around 7) and pancreatic amylase has an optimum pH of around 8. But if we consider the given options, amylase's pH shown as 8 is incorrect as salivary amylase (in mouth - slightly acidic to neutral) and pancreatic amylase (small intestine - alkaline) but the general perception if we assume pancreatic amylase, still the way it's presented in the table (if compared to standard enzyme - pH knowledge) is wrong.
• Pepsin: Optimum pH for pepsin is around 1.5 - 2 (highly acidic, in the stomach). The table shows pepsin's pH as 8 which is incorrect.

Answer:

D. pepsin - 8 (Incorrect as pepsin's optimum pH is acidic around 1.5 - 2), C. amylase - 8 (Incorrect as salivary amylase is around 7 and if pancreatic amylase - though in small intestine (pH 8) but the general knowledge comparison with other enzymes in the table context is wrong), B. lipase - 3 (Incorrect as lipase's optimum pH is around 8), A. trypsin - 8 (Correct as trypsin functions in small intestine (alkaline, pH around 8)). So the correct match is A. trypsin - 8.