BI-1832
Digestive enzymes
Biology · Secondary 4 · Medium · Digestive enzymes
A student adds amylase solution to starch in a test tube and leaves it at 37 °C. Every 2 minutes, she removes a drop and places it in a well on a starch-agar plate. After 20 minutes, iodine solution is added to each well.
Which result shows that amylase has completely digested the starch by 10 minutes?
Which result shows that amylase has completely digested the starch by 10 minutes?
- All wells are blue-black.
- Wells up to 8 min are blue-black; 10 min and later are brown.
- All wells are brown.
- Only the 2 min well is brown; others are blue-black.
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