a biologist wants to test a pesticide to see at what concentration it is most effective....
a biologist wants to test a pesticide to see at what concentration it is most effective. He wants to test concentrations at 1, 10, 100 and 1000 g/L. What will be his positive control, and what will be his negative control?
Homework Answers
A negative control is the one in which all the components of a reaction are added except the component which is to be tested. In this case the pesticide is to be tested. So this reaction tube will contain all the components but not the pesticides. This tube will give us no result with respect to the the working of pesticides.
A positive control is the one which contains all the components of a reaction. It also contains the component which is to be tested. To this tube will contain all the the reagent used in the reaction along with the pesticides to be tested. But now we do not know the concentration of pesticides to be added. So we can use another pesticides whose concentration is known to us. This reaction tube will give us positive result.
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