I’m studying for my Biology class and need an explanation.

Activity 1: Biuret Assay for Protein

 

Table 1: Biuret Assay for Protein

	Your Prediction	Actual Assay Results Description	Protein Present? (Yes/No)	Nutrition Label Information
PositiveControl (BSA)		Purple
Negative Control (Water)		Light blue
Milk		purple
Apple Juice		Light blue
Potato flakes		Light blue
Gelatin		purple
Egg White		purple

Notes:

 

 

 

 

 

 

 

 

 

 

 

Activity 2:Lugol’s Iodine Test for Starch

 

Table 2: Lugol’s Test for Starch

	Prediction	Assay Results Description	Starch Present? (Yes/No)	Nutrition Label Information
Positive Control (1% corn starch)		Dark Blue/black
Negative Control (Water)		golden
Milk		golden
Apple Juice		golden
Potato flakes		Dark blue/black
Gelatin		golden
Egg White		golden

 

 

Notes:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Activity 3: Benedict’s Test for Reducing Sugars

 

Table 3: Benedicts Test for Reducing Sugars

	Prediction	Assay Results Description	Sugar Present? (Yes/No)	Nutrition Label Information
Positive Control (10% Glucose)		Brick red color
Negative Control (Water)		Light blue
Milk		Orange-red color
Apple Juice		Orange-red color
Potato flakes		Yellow-green
Gelatin		Light blue
Egg White		Light blue