Question

which macromolecule includes phosphorus in the molecular structure?
lipids
nucleic acids
proteins
carbohydrates

Explanation:

• Carbohydrates: Composed of carbon, hydrogen, and oxygen. No phosphorus in their basic molecular structure.
• Proteins: Main elements are carbon, hydrogen, oxygen, nitrogen (and sometimes sulfur). Phosphorus is not a typical component of the core molecular structure of most proteins.
• Lipids: Mainly carbon, hydrogen, and oxygen. While some complex lipids (like phospholipids) have phosphorus, the general category of lipids (as a macromolecule class) is not defined by having phosphorus in their molecular structure in the same fundamental way as nucleic acids.
• Nucleic acids (DNA and RNA): Their structure includes a phosphate group. The backbone of nucleic acids is made up of sugar - phosphate units. So, phosphorus is an essential part of the molecular structure of nucleic acids.

Answer:

nucleic acids