Identifying functional groups in biomolecules

Steps:

• Examine the biological molecules (e.g., proteins, lipids, carbs, nucleic acids) and their key chemical groups.
• Match groups in rows 1-4 to those typically present: row 1 for amide/peptide in proteins, row 4 for ester/phosphate in lipids/nucleic acids.
• Eliminate rows with irrelevant groups: row 2 (e.g., aldehyde in carbs, but not universal), row 3 (e.g., hydroxyl, too broad or mismatched).
• Select rows that cover all listed molecules without extras.

Why B is correct:

• Rows 1 and 4 contain amide (proteins) and ester/phosphate (lipids/nucleic acids), matching standard biomolecule definitions.

Why the others are wrong:

• A includes row 2 (aldehyde not in all biomolecules) and row 3 (hydroxyl mismatched).
• C duplicates B, invalid choice.
• D omits row 1 (amide essential for proteins).

Not enough information for full table verification.

Final answer: B