Triglyceride Structure and Properties

Steps:

• Identify statement 1: Bonds between fatty acids and glycerol are ester bonds, formed by esterification of carboxylic acid (fatty acid) and alcohol (glycerol) groups—correct.
• Identify statement 2: Claims condensation between hydroxyl of fatty acid and carboxyl of glycerol—incorrect, as fatty acids lack hydroxyl groups for this; it's glycerol's hydroxyl and fatty acid's carboxyl.
• Identify statement 3: Insolubility due to non-polar fatty acid chains—correct, as non-polar hydrocarbon chains repel water via hydrophobic interactions.
• Select option matching correct statements 1 and 3 only.

Why C is correct:

• C accurately identifies statements 1 and 3, aligning with the definition of ester bonds in lipids and the hydrophobic principle where non-polar chains cause water insolubility.

Why the others are wrong:

• A includes incorrect statement 2 on reaction groups.
• B includes incorrect statement 2 and omits correct statement 3.
• D omits correct statement 1 on ester bonds.

Final answer: C