Question

what is the difference(s) between fatty acids and steroids?
only fatty acids have a long chain of hydrocarbons.
only steroids have four rings fused together in a structure.
fatty acids have a hydrophobic component; steroids do not.
none of the above

Explanation:

• Fatty acids: They are long - chain hydrocarbons (usually 12 - 24 carbons) with a carboxyl group (\(-COOH\)) at one end. For example, palmitic acid (\(C_{15}H_{31}COOH\)) has a 16 - carbon chain.
• Steroids: They have a characteristic structure of four fused rings (three six - membered rings and one five - membered ring). Cholesterol is a well - known steroid.
• Regarding the hydrophobic component: Both fatty acids (due to their long hydrocarbon chains) and steroids (due to their non - polar ring structures) have hydrophobic components. So, the statement “Fatty acids have a hydrophobic component; steroids do not” is incorrect.

Answer:

A. Only fatty acids have a long chain of hydrocarbons.
B. Only steroids have four rings fused together in a structure.