Biological macromolecules are organized into four main categories. What type of macromolecule contains phosphorus as part of a phosphate group? 1.) lipids
2.) proteins
3.) nucleic acid
4.) carbohydrates

3.) nucleic acid

Explanation:

Biological macromolecules can be defined as a very large molecule (structure) that comprises of covalently bonded organic atoms and smaller molecular structures (monomers).

Biological macromolecules are organized into four main categories and these includes;

I. Lipids: these categories of biological molecules is mainly made up of fats and it is responsible for providing the body with long-term energy.

II. Carbohydrates: it is contained in energy-giving foods and it aids the functioning of the muscles, nervous system and other organs found in the body.

III. Proteins: it contains amino acids and it is responsible for maintaining the functioning of the body system.

IV. Nucleic acid: it comprises of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) which are the genetic codes (blueprints) for living organisms.

Hence, the type of macromolecule that contains phosphorus as part of a phosphate group (sugar 2-deoxyribose) is nucleic acid.