unit 4 bio - biological molecules
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16 Terms
What elements make up carbohydrates?
Carbon, hydrogen, oxygen
What elements make up fats and oils?
Carbon, hydrogen, oxygen
What elements make up proteins?
Carbon, hydrogen, oxygen, nitrogen (sometimes sulfur)
What is starch made from?
Glucose
What is glycogen made from?
Glucose
What is cellulose made from?
Glucose
What are proteins made from?
Amino acids
What are fats and oils made from?
Fatty acids and glycerol
What is the test for starch?
Add iodine solution; a blue-black color indicates starch
What is the test for reducing sugars?
Add Benedict’s solution and heat; a brick-red precipitate indicates reducing sugars
What is the test for proteins?
Add biuret solution; a purple color indicates protein
What is the test for fats and oils?
Add ethanol then water; a milky white emulsion indicates fat
What is the test for vitamin C?
Add DCPIP; the blue color disappears if vitamin C is present
What is the structure of a DNA molecule?
Two strands coiled together to form a double helix
What holds the DNA strands together?
Bonds between pairs of bases
How do DNA bases pair up?
A with T, and C with G
Note 
Flashcards (20)