The family of macromolecules are composed of carbon, hydrogen and oxygen in a 1:2:1 ratio and includes sugars, starches, glycogen, and cellulose

The correct answer is - carbohydrates.

Explanation:

Carbohydrates are one of the major macromolecules other than protein, lipids, and nucleic acid. Carbohydrates are the macromolecules made up of carbon, hydrogen, and oxygen in the ration of 1:2:1 which means one carbon, two hydrogens, and one oxygen.

These are divided into monosaccharides, disaccharides, and polysaccharides. These are commonly known as sugars, these molecules include, glucogen, cellulose, and starches.

Thus, the correct answer is - carbohydrates.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.