Lipids Flashcards
Which of the following are groups of lipid?
1. Triglycerides
2. Biglycerides
3. Phosphates
4. Phospholipids
1 and 4
Which of the following is not a function of lipids?
1. Energy storage
2. Insulation
3. Strength
4. Hormone production
3
Fatty acids consist of an acid group at one end of the molecule and a hydrocarbon chain, which is usually denoted by which letter?
R
What is the difference between monounsaturated fatty acids and polyunsaturated fatty acids?
Polyunsaturated fatty acids have more than one C=C bond
What type of fatty acid is straight?
Saturated
Which type of fatty acid is more fluid and oily?
Unsaturated
What is an emulsion?
A mixture containing tiny particles of one liquid suspended in another
What is the emulsion test used to test for?
Lipids
What do you observe with a positive emulsion test?
Cloudy white suspension forms when shaken with ethanol and deionized water
Lipids are not soluble in which of the following?
1. Benzene
2. Water
3. Ethanol
4. Acetone
2
Which type of reaction is the formation of an ester bond between each fatty acid and glycerol in triglycerides?
Condensation
Which of the following is a function of lipids?
1. Strength
2. Water-proofing
3. Information storage
4. Catalysis
2
Which of the following is not a function of lipids?
1. Insulation
2. Source of energy
3. Protection
4. Heredity
4
Fats are generally made of…
Saturated fatty acids
Oils are generally made of…
Unsaturated fatty acids
