18 Questions
What is the main reason why waxes are completely water insoluble?
The long tails of the waxes contribute significant hydrophobicity
What is the function of waxes in some marine microorganisms?
For energy storage
What is the characteristic of the salts of dodecyl sulfate with divalent cations?
They are more soluble
What is the general shape of the membrane-forming lipids?
Cylindrical
What is the purpose of sodium dodecyl sulfate (SDS) in gel electrophoresis?
To form micelles around proteins
What determines the firmness of waxes?
Both b and c
What is the typical range of carbon atoms in a fatty acid's hydrocarbon chain?
12 to 24
What is an example of a saturated fatty acid?
Stearic acid
What is the term for a fatty acid with one or more double bonds?
Unsaturated
What is the term for the triesters of fatty acids and glycerol?
Triacylglycerols
What is a characteristic of naturally occurring fatty acids?
They typically have an even number of carbon atoms
What is one of the functions of fat storage in animals?
To generate heat for thermoregulation
What type of structure do membrane lipids tend to form in contact with water?
Surface monolayers, bilayers, micelles, or vesicles
What is the result of hydrolyzing fats with strong bases?
Production of fatty acid salts
What is the function of adipocytes in adipose tissue?
To store energy in the form of fat
What is a disadvantage of soap as a cleanser?
It forms a scum in hard water
What is the function of fat storage in animals that live in cold environments?
To insulate the body from cold temperatures
What is the term for the process of hydrolyzing fats with strong bases to produce soap?
Saponification
This quiz covers the molecular structure and behavior of lipids, including synthetic detergents and their properties.
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