BI-1761
Digestive enzymes
Biology · Secondary 4 · Medium · Digestive enzymes
A student sets up four test-tubes at 37 °C:
1. Starch solution only
2. Starch solution + boiled saliva
3. Starch solution + fresh saliva
4. Distilled water only
After 15 minutes, which test-tube will give a brick-red colour with Benedict’s solution after heating?
1. Starch solution only
2. Starch solution + boiled saliva
3. Starch solution + fresh saliva
4. Distilled water only
After 15 minutes, which test-tube will give a brick-red colour with Benedict’s solution after heating?
- Test-tube 1 only
- Test-tube 2 only
- Test-tube 3 only
- Test-tube 4 only
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