Question

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

Explanation:

Macromolecules are large molecules essential for life. Carbohydrates have the general formula \(C_nH_{2n}O_n\), so they contain \(CHO\). Lipids (a type of macromolecule) also have \(CHO\) (e.g., triglycerides). Proteins have \(C, H, O\) along with \(N\) (and sometimes \(S\)). Nucleic acids (\(DNA, RNA\)) have \(C, H, O\) along with \(N\) and \(P\). So all major macromolecules (carbohydrates, lipids, proteins, nucleic acids) have \(CHO\).

Answer:

ALL of them!