Common structural features of triglycerides and phospholipids

Steps:

• Triglycerides consist of glycerol esterified to three fatty acid chains.
• Phospholipids consist of glycerol esterified to two fatty acid chains and a phosphate group.
• Both share fatty acid components that determine saturation status.
• Evaluate each option against these structures to identify the shared correct statement.

Why B is correct:

• Fatty acids in both molecules can contain only single C-C bonds (saturated) or include double bonds (unsaturated), as defined by their hydrocarbon chain composition.

Why the others are wrong:

• A: Applies only to phospholipids; triglycerides lack a phosphate group.
• C: Both are amphipathic but overall nonpolar due to hydrophobic tails dominating polarity.
• D: Triglycerides have three ester bonds; phospholipids have only two.

Final answer: B