Amylase and starch are mixed and placed at 0°C. After the IKI test, the solution turns black. A Benedict's test yields a negative result. Was starch digested? How do you know?
A) No, the Benedict's test revealed no sugars in solution.
B) Yes, the starch test indicated that no starch remained, and the Benedict's test revealed the presence of sugars in solution.
C) Some was digested; the starch test showed some starch and the Benedict's test showed some sugars.

Question

Quizplus · Accepted Answer

The IKI test turning black indicates the presence of starch, and a negative Benedict's test means no reducing sugars (like maltose, which would be a product of starch digestion) were detected. Therefore, starch was not digested.

Amylase and Starch Are Mixed and Placed at 0°C