Laboratory Chemical Experiments at School Poster

TOPIC: CHEMICAL COMPOSITION OF CELLS. BIOLOGY LAB.

OBJECTIVES:. 1:USING SEVERAL SAMPLES AND FINDING THE POSITIVE AND NEGATIVE FOR EACH SAMPLE.

THREE TYPES OF TESTS:. First one: tests to detect proteins - Biuret reagent.

Results:. -Tube 1: negative the color is blue no protein . -Tube 2: positive the color is purple there is protein. -Tube 3: negative the color is blue no protein. -Tube 4: positive the color purple there is protein . -Tube 5: negative the color blue no protein ..

Results:. -Tube 1: negative the color is brown no starch . -Tube 2: positive the color is purple there is starch . -Tube 3: negative the color is brown no starch . -Tube 4: negative the color brown no starch . -Tube 5: positive the color purple there is starch ..

c cox. Tube1: WATER Tube2: GLUCOSE Tube3: UNKOWN1 Tube4: UNKOWN2 Tube5: UNKOWN3.

Results:. -Tube 1: negative the color is blue no glucose . -Tube 2: positive the color is orange to red there is glucose . -Tube 3: positive the color is orange to red there is glucose . -Tube 4: negative the color blue no glucose . -Tube 5: negative the color blue no glucose ..

CONCLUSION:. -We monitor the color change in each test to distinguish between them and to determine the positive and negative outcomes, and we learn how to recognize We learn that on the glucose test, we should heat the tubes to give us the true colors after that manage the positive and negative findings by observing the colors on each tube to determine when a test is positive and when it is negative..