BI-1303
Effect of temperature and pH on enzymes
Biology · Secondary 4 · Medium · Effect of temperature and pH on enzymes
A student adds amylase to starch solution and keeps the mixture at 70 °C. After 5 minutes, he tests the mixture with iodine solution and it is still blue‑black. Which statement best explains this result?
- The starch has already been completely digested.
- The enzyme is denatured and cannot bind to starch.
- The iodine solution does not work at high temperature.
- Too much amylase was added, so the reaction stopped.
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