Multiple Choice
Which type of fatty acids only contain Carbon-Carbon single bonds?
a) Unsaturated.
b) Saturated.
c) Trans fats.
d) Steroids.
4. Biomolecules
Lipids
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Choose the correct statement about biological waxes:
a) They contain at least one steroid molecule.
b) They are fatty acids bound to long chain alcohol molecules.
c) They are extremely hydrophilic.
d) They are made of 4 fused carbon ring molecules.
A
They contain at least one steroid molecule.
B
They are fatty acids bound to long chain alcohol molecules.
C
They are extremely hydrophilic.
D
They are made of 4 fused carbon ring molecules.
Verified step by step guidance1
Understand the structure of biological waxes: Biological waxes are composed of long-chain fatty acids esterified to long-chain alcohols. This structure makes them hydrophobic and solid at room temperature.
Eliminate options that do not match the structure of biological waxes: Since biological waxes are not composed of steroids or fused carbon rings, eliminate options mentioning these structures.
Consider the hydrophobic nature of waxes: Biological waxes are not hydrophilic; they are hydrophobic due to their long hydrocarbon chains, which repel water.
Identify the correct statement: The statement that describes biological waxes as 'fatty acids bound to long chain alcohol molecules' accurately reflects their chemical structure.
Conclude with the correct understanding: Biological waxes are important for their protective and water-repellent properties in nature, such as in plant cuticles and animal coatings.
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