BI-642
Digestive enzymes
Biology · Secondary 3 · Hard · Digestive enzymes
Four test tubes contain the following:
P: starch solution only
Q: starch solution + amylase
R: boiled amylase + starch solution
S: water only
After 20 minutes at 37°C, iodine solution is added. In which test tube(s) will a blue-black colour be seen?
P: starch solution only
Q: starch solution + amylase
R: boiled amylase + starch solution
S: water only
After 20 minutes at 37°C, iodine solution is added. In which test tube(s) will a blue-black colour be seen?
- P only
- Q only
- P and R only
- P, Q and R only
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