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.

Answer: (B)

Verified step by step guidance

1. Begin by understanding what biological waxes are. Biological waxes are a type of lipid, which are hydrophobic molecules primarily composed of carbon and hydrogen atoms.
2. Consider the structure of biological waxes. They typically consist of long-chain fatty acids esterified to long-chain alcohols. This structure is key to their function and properties.
3. Evaluate the hydrophobic nature of biological waxes. Due to their long hydrocarbon chains, biological waxes are generally hydrophobic, meaning they repel water.
4. Differentiate biological waxes from other lipid types, such as steroids. Steroids are characterized by a structure of four fused carbon rings, which is distinct from the structure of biological waxes.
5. Conclude that the correct statement about biological waxes is that they are fatty acids bound to long chain alcohol molecules, based on their structural composition and properties.