When testing an unknown substance two controls may be used for comparison to the unknown.
(a - control and a + control). The negative control shows no change
when the testing agent is used indicating the absence of a certain molecule. The positive control shows a definitive change indicating the presence of a certain molecule.
Testing Unknowns
- Click on the test tube or tubes that shows a positive test.
- Click on the solution name for the lipid test.
- Click on the word or words for the contents of unknown 1.
- Click on the test tube or tubes that shows a positive test.
- Click on the solution name for the protein test.
- Click on the word or words for the contents of unknown 2.
- Click on the test tube or tubes that shows a positive test.
- Click on the solution name for the reducing sugar test.
- Click on the word or words for the contents of unknown 3.
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