Question

Glycogen is an energy-storage molecule in humans. A hormone that is called insulin controls the storage of glycogen in the liver. Insulin is made up of amino acids.

Which statement correctly identifies the types of macromolecules that are described?
Glycogen is a protein, and insulin is a lipid.
Glycogen is a lipid, and insulin is a protein.
Glycogen is a carbohydrate, and insulin is a lipid.
Glycogen is a carbohydrate, and insulin is a protein.

Answer 1

Glycogen is a carbohydrate, insulin is a protein.

Glycogen is a polysaccharide of glucose
Proteins are basically just a bunch of amino acids bound together.

Answer 2

Glycogen is a carbohydrate, and insulin is a protein.

Step-by-step explanation:

Glycogen is a polysaccharide made of thousands of glucose molecules. This is also called ‘animal starch’. The glucose is stored as glycogen in animal cells and humans. Thus, it is a carbohydrate. Insulin is a hormone secreted by beta cells of islets of Langerhans. It is a polypeptide made of amino acids. Thus, it is a protein.