Question

which three (3) elements are involved in the structure of all four biomolecules? (select all that apply)
phosphorus (p)
oxygen (o)
carbon (c)
hydrogen (h)
nitrogen (n)
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Explanation:

Biomolecules include carbohydrates, lipids, proteins, and nucleic acids. All of them contain carbon (C) as the backbone. Hydrogen (H) and oxygen (O) are also present in their structures. For example, carbohydrates have the general formula \(C_nH_{2n}O_n\). Lipids have hydrocarbon chains (with C and H) and often contain O. Proteins have amino acids with C, H, O (in the carboxyl group, etc.). Nucleic acids have a sugar - phosphate backbone (sugar has C, H, O). Phosphorus (P) is only in nucleic acids (in the phosphate group). Nitrogen (N) is in proteins (in amino groups) and nucleic acids (in nitrogenous bases), but not in all carbohydrates and lipids (e.g., simple sugars like glucose \(C_6H_{12}O_6\) have no N; triglycerides - a type of lipid - may have no N unless they are modified).

Answer:

oxygen (O), carbon (C), hydrogen (H)