BI-1806
Digestive enzymes
Biology · Secondary 4 · Medium · Digestive enzymes
A student tests a food sample for starch using iodine solution. The sample originally contains both starch and glucose. After adding amylase and leaving it at 37°C for 20 minutes, the iodine test is repeated and stays yellow-brown. What does this show?
- Starch is still present because iodine stayed yellow-brown.
- All starch has been broken down by amylase.
- Glucose has been converted into starch by amylase.
- Amylase has been denatured at 37°C.
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