Question: ans At this point, the tubes all contain unknown solutions and amylase that has reacted for 30 minutes. You added Benedict reagent, and the unknown

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At this point, the tubes all contain unknown solutions and amylase that has reacted for 30 minutes. You added Benedict reagent, and the unknown solutions are still light blue, indicating no simple sugars are present. Which of the following is/are possible reason(s) for a negative result in this case? Select all that apply. () A. All unknown solutions are water. (_.) B. Unknown solutions were mixed incorrectly. (_.) C. The samples are not heated yet

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