Question

a student completed a lab investigation on an unknown biomolecule sample. the student ran a test and discovered that the sample contains only carbon, hydrogen, and oxygen. the student then rubbed a small amount of the sample on a piece of paper and noticed that the sample left a greasy stain. which of the following biomolecules does the student have? a nucleic acids b carbohydrates c lipids d proteins

Explanation:

Nucleic acids contain P, proteins contain N, so A and D are excluded. Carbohydrates lack greasy properties; lipids (C) are C/H/O-based and greasy.

Answer:

C. Lipids