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Lipid Molecular Structure and Behavior

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Questions and Answers

What is the main reason why waxes are completely water insoluble?

The long tails of the waxes contribute significant hydrophobicity (correct)

The small head group contributes significant hydrophilicity

The waxes are formed by the saponification of triacylglycerols

The esterification of fatty acids and long-chain alcohols creates a hydrophilic environment

What is the function of waxes in some marine microorganisms?

To form micelles around proteins

For energy storage (correct)

To serve as water repellents

To serve as a structural function

What is the characteristic of the salts of dodecyl sulfate with divalent cations?

They are not soluble at all

They are more insoluble

They are more soluble (correct)

They are less soluble

What is the general shape of the membrane-forming lipids?

Cylindrical Signup and view all the answers

What is the purpose of sodium dodecyl sulfate (SDS) in gel electrophoresis?

To form micelles around proteins Signup and view all the answers

What determines the firmness of waxes?

Both b and c Signup and view all the answers

What is the typical range of carbon atoms in a fatty acid's hydrocarbon chain?

12 to 24 Signup and view all the answers

What is an example of a saturated fatty acid?

Stearic acid Signup and view all the answers

What is the term for a fatty acid with one or more double bonds?

Unsaturated Signup and view all the answers

What is the term for the triesters of fatty acids and glycerol?

Triacylglycerols Signup and view all the answers

What is a characteristic of naturally occurring fatty acids?

They typically have an even number of carbon atoms Signup and view all the answers

What is one of the functions of fat storage in animals?

To generate heat for thermoregulation Signup and view all the answers

What type of structure do membrane lipids tend to form in contact with water?

Surface monolayers, bilayers, micelles, or vesicles Signup and view all the answers

What is the result of hydrolyzing fats with strong bases?

Production of fatty acid salts Signup and view all the answers

What is the function of adipocytes in adipose tissue?

To store energy in the form of fat Signup and view all the answers

What is a disadvantage of soap as a cleanser?

It forms a scum in hard water Signup and view all the answers

What is the function of fat storage in animals that live in cold environments?

To insulate the body from cold temperatures Signup and view all the answers

What is the term for the process of hydrolyzing fats with strong bases to produce soap?

Saponification Signup and view all the answers