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Multiple Choice
Which of the following structures best represents a fatty acid molecule?
A
C6H12O6
B
CH3(CH2)14COOH
C
NH2CH2COOH
D
C2H5OH
Verified step by step guidance
1
Understand the definition of a fatty acid: Fatty acids are carboxylic acids with long aliphatic chains, which can be either saturated or unsaturated. They typically have a carboxyl group (COOH) at one end.
Analyze the given options: Look for the presence of a carboxyl group (COOH) and a long hydrocarbon chain, which are characteristic of fatty acids.
Evaluate option C6H12O6: This is the molecular formula for glucose, a carbohydrate, not a fatty acid. It lacks a carboxyl group and a long hydrocarbon chain.
Evaluate option CH3(CH2)14COOH: This structure has a carboxyl group (COOH) and a long hydrocarbon chain (15 carbon atoms), fitting the definition of a fatty acid.
Evaluate option NH2CH2COOH: This is the structure of glycine, an amino acid, which contains an amino group (NH2) and a carboxyl group but lacks a long hydrocarbon chain typical of fatty acids.