Test-tube results for the use of IKI. The color change in the contents of each test tube

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Test-tube results for the use of IKI. The color change in the contents of each test tube is also shown in the test-tube rack at the upper left corner of the figure. A dark shade indicates a positive iodine reaction (the actual color is dark blue) and a light shade indicates a negative reaction (the actual color is yellow). Because Rob used iodine in this case, you know that iodine is a test for starch. Why, then, was the iodine test negative for test tube 2A?

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Campbell Biology

ISBN: 978-0321775658

10th edition

Authors: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson

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