Question

Why will a decrease in pH of the stomach affect protein digestion? Decrease in pH of the stomach will distort the structure of peptides in food, which affects the action of the enzyme pepsin. Decrease in pH of the stomach will distort the active site of the enzyme pepsin, which affects its action. Decrease in pH of the stomach will distort the active site of the enzyme lipase, which affects protein digestion.

Answer 1

If the pH is too low in the stomach, it will denature the proteins that usually break down food. The major enzyme in the stomach is pepsin, which breaks down proteins in the food we eat. Therefore, the answer is the second statement, "Decrease in pH of the stomach will distort the active site of the enzyme pepsin, which affects its action." Hope this helps! :)