health information management
Biological Molecules
Experiment-Specific Questions
Experiment 1: Monosaccharide Test
1. Fill in the table below with the results from the monosaccharide test experiment, and your conclusions based on those results.
Results Monosaccharide Test
Solution
Initial Color
Color with Benedict's Solution
Color After Heating
Monosaccharide?
glucose solution
clear
blue
orange
yes water clear
blue
blue
no sucrose solution
clear
blue
blue
no fructose solution clear
blue
orange
yes
1. Benedict’s solution is added to white grape juice and heated. The color changes from blue to orange. Based on this result, what biological molecules are present in the white grape juice? monosaccharide
1. Benedict’s solution can be used to distinguish between monosaccharides and disaccharides. Why? Monosaccharide will change the benedict’s solution from blue to orange when heated. Disaccharide will not change the benedicts change the color.
1. Benedict’s solution cannot be used to distinguish between two monosaccharides. Why? The two monosaccharides bonded together and formed an disaccharide. Thus the disaccharide will not change the color.
Experiment 2: Starch Test
1. Fill in the table below with the results from the starch test experiment.
Results Starch Test
Solution
Initial Color
Color with Iodine Solution starch solution
clear
purple water clear green
1. Iodine solution is added to a chocolate chip cookie solution. The color changes to purple. Based on this result, what biological molecules are present in the chocolate chip cookie solution? Starch
1. What is the relationship between monosaccharides and starches? The monosaccharides bind together and form long chains. The chains are called polysaccharides or starched.
Experiment 3: Lipid Test
1. Fill in the table below with the results from the lipids test
Experiment-Specific Questions
Experiment 1: Monosaccharide Test
1. Fill in the table below with the results from the monosaccharide test experiment, and your conclusions based on those results.
Results Monosaccharide Test
Solution
Initial Color
Color with Benedict's Solution
Color After Heating
Monosaccharide?
glucose solution
clear
blue
orange
yes water clear
blue
blue
no sucrose solution
clear
blue
blue
no fructose solution clear
blue
orange
yes
1. Benedict’s solution is added to white grape juice and heated. The color changes from blue to orange. Based on this result, what biological molecules are present in the white grape juice? monosaccharide
1. Benedict’s solution can be used to distinguish between monosaccharides and disaccharides. Why? Monosaccharide will change the benedict’s solution from blue to orange when heated. Disaccharide will not change the benedicts change the color.
1. Benedict’s solution cannot be used to distinguish between two monosaccharides. Why? The two monosaccharides bonded together and formed an disaccharide. Thus the disaccharide will not change the color.
Experiment 2: Starch Test
1. Fill in the table below with the results from the starch test experiment.
Results Starch Test
Solution
Initial Color
Color with Iodine Solution starch solution
clear
purple water clear green
1. Iodine solution is added to a chocolate chip cookie solution. The color changes to purple. Based on this result, what biological molecules are present in the chocolate chip cookie solution? Starch
1. What is the relationship between monosaccharides and starches? The monosaccharides bind together and form long chains. The chains are called polysaccharides or starched.
Experiment 3: Lipid Test
1. Fill in the table below with the results from the lipids test