Question

which macromolecules contain carbon, hydrogen, and oxygen (cho)?
only carbohydrates
all of them!
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Explanation:

Carbohydrates, lipids, and proteins (macromolecules) all contain carbon (C), hydrogen (H), and oxygen (O). Nucleic acids also have these elements along with nitrogen (N) and phosphorus (P). So all macromolecules contain CHO.

Answer:

ALL of them!