Why will a decrease in pH of the stomach affect protein digestion?

A) Decrease in pH of the stomach will distort the structure of peptides in food, which affects the action of the enzyme pepsin.

B) Decrease in pH of the stomach will distort the active site of the enzyme pepsin, which affects it's action.

C) Decrease in pH of the stomach will distort the active site of the enzyme lipase, which affects protein digestion.

Question

Biology

Elliot Spears

14 March, 05:05

Why will a decrease in pH of the stomach affect protein digestion?

A) Decrease in pH of the stomach will distort the structure of peptides in food, which affects the action of the enzyme pepsin.

B) Decrease in pH of the stomach will distort the active site of the enzyme pepsin, which affects it's action.

C) Decrease in pH of the stomach will distort the active site of the enzyme lipase, which affects protein digestion.

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Aron · Answer 1

Pepsin is needed in the digestion of protein, a d ecrease in pH of the stomach will distort the active site of the enzyme pepsin, which affects it's action. Because pepsin is a tertiary protein that possesses many bonds, a change in pH will see these bonds broken, and in so doing change the shape of the enzyme as well as the active site shape and as such affects the overall function of the molecule.