Title: Digestion of Starch
If synthetic saliva breaks down the cracker the most
Then more of the cracker should be digested
Because synthetic saliva contains amylase, and amylase helps break down complex carbohydrates.
Data Table: The results of the iodine and Benedict’s tests for the Carbohydrate lab
Test Tube contents and number Color of iodine test Color of Benedict’s test How much is present?
1= present How much glucose is present?
0= none 1= some 2= a lot
(Control Setup) Dark Blue/ Blue
(Control Setup) Yellow Blue 0 2
#3 Experimental Cracker Dark Blue/
#4 Saliva Yellow Blue 0 1
#9 Cracker and
Synthetic saliva Dark purple Yellow 1 2
#11 Cracker with pepsin and HC1 Dark Blue Yellow 1 1
Analysis of the Data
My hypothesis was supported by the data. The data shows that synthetic saliva was able to break down both the starch and glucose. The data also demonstrates that the amylase in the synthetic saliva did its job. The amylase is what breaks down sugars in the mouth. The starch was easily digested and broken down in able to become a starch when it gets down to the stomach.
Test Tube #1: Starch
The purpose of the starch control is to compare whether the test came out to be positive in starch or negative. This test was chosen to demonstrate a positive result of starch in the test tube. The starch test was positive and that was due to the color turning a dark blue/black color. The glucose test was negative. This makes sense because in starch there are no sugars, or anything that produces sugar.
Test tube #2: Glucose
The purpose of the glucose control is to see what a positive test for glucose looks like. This would test was chosen to demonstrate the difference between starch and glucose. The result of the starch test was negative. This makes sense because in a glucose test there is just