ANSWER THE FOLLOWING QUESTIONS
(ignore questions in lab manual)
1) Describe clearly and precisely the function of a positive control.
2) Describe the function of a negative control. What conclusions you would make about your entire experiment if the negative control did not act accordingly?
3) What might you conclude about the results of your test samples if one or more of the test samples tested positive but the positive control did not work according to plan?
4) What tubes represent the positive control and negative controls in
Procedures 3.1, 3.2, 3.3 and 3.4?
5) Procedure 3.1 step 11 Optional treatment (see exercise in this pdf) asked you to include a tube containing a known reducing sugar and Benedict’s reagent while omitting heat. What was …show more content…
Your result will help you answer this question. 9) Provide definitions for the words miscible and immiscible. Salad oils and water are immiscible. Please provide examples of other substances that are not miscible with water. The function of a positive control is to use a known substance to illustrate what a positive result should look like. A positive control checks that your experimental system is functioning properly by .
5. The function of a negative control is to demonstrate what a negative result should look like.
6. What might you conclude about the results of your test samples if one or more of the test samples tested positive but the positive control did not work according to plan?
7. In procedure 3.1, test tube 2 (known reducing sugar solution) was the positive control. In procedure 3.2, test tube 2 (known starch solution) was the positive control. In procedure 3.3, test tube 2 (known protein solution) was the positive control. In procedure 3.4, test tube 2 (known lipid solution) was the positive control. In all procedures, test tube 1 (containing distilled water) was the negative control.
Things that don’t dissolve in water: wax, glass, sand, gold, platinum,