Question

testing for carbohydrates while testing an unknown solution a student adds benedicts reagent and watches as the contents of the test tube turn green. the student then added amylase and heats the test tube. this causes the contents to turn red. which of the following conclusions could the student make? multiple choice the solution has both simple sugars and starch. the solution contained starch only. the solution contained only simple sugars. the solution contained neither simple sugars or starch.

Explanation:

Benedict's reagent is used to test for simple sugars. A color - change to red indicates the presence of simple sugars. Since the contents turned red with Benedict's reagent, simple sugars are present. Amylase breaks down starch, but we have no evidence regarding starch presence or absence from the given Benedict's reagent test result alone. So we can only conclude that simple sugars are present.

Answer:

The solution contained only simple sugars.