BI-631
Digestive enzymes
Biology · Secondary 3 · Medium · Digestive enzymes
A student adds amylase to a starch solution at pH 7 and 37 °C. After 10 minutes, iodine solution is added and the mixture remains yellow-brown. What does this result show?
- Starch is still present because iodine is always yellow-brown.
- All starch has been digested by amylase into smaller molecules.
- Amylase is inactive at pH 7 and 37 °C.
- Too much iodine was added, so the colour cannot change.
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