Biology 5090 · O Level · Effects of temperature and pH

Effects of temperature and pH — practice question

Starch digestion takes place in the mouth cavity and in the duodenum, but it comes to an end in the stomach. What is the reason for this?

  • AAll the starch has been digested before it reaches the stomach.
  • BCells in the stomach do not produce amylase.
  • CThe pH in the stomach changes the shape of the amylase.
  • DThe temperature in the stomach is too high for amylase to work.

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