A student put amylase and starch solution into a test-tube. After a few minutes, the student tested samples of the liquid from the test-tube. They noted the colours of the samples after testing for starch and reducing sugar. Which row shows the test used and the expected results?
- Astarch test: DCPIP; reducing sugar test: Benedict’s solution; result for starch: blue-black; result for reducing sugar: red
- Bstarch test: DCPIP; reducing sugar test: biuret; result for starch: yellow-brown; result for reducing sugar: blue
- Cstarch test: iodine solution; reducing sugar test: Benedict’s solution; result for starch: yellow-brown; result for reducing sugar: red
- Dstarch test: iodine solution; reducing sugar test: biuret; result for starch: blue-black; result for reducing sugar: blue