BI-4
Effect of temperature and pH on enzymes
Biology · Secondary 3 · Medium · Effect of temperature and pH on enzymes
A student investigates the effect of pH on amylase. Equal volumes of starch solution and amylase are mixed at 37 °C in three tubes.
Tube 1: pH 3
Tube 2: pH 7
Tube 3: pH 11
After 10 minutes, iodine solution is added. In which tube will the iodine remain yellow-brown (no starch)?
Tube 1: pH 3
Tube 2: pH 7
Tube 3: pH 11
After 10 minutes, iodine solution is added. In which tube will the iodine remain yellow-brown (no starch)?
- Tube 1 only
- Tube 2 only
- Tube 3 only
- Tubes 1 and 3 only
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