Question

Glycogen is a homopolymer made up of
A. Glucose units
B. Galactose units
C. Ribose units
D. Amino acids

Answer 1

Hint: Glycogen are polysaccharides stored in our body. It breaks to give energy in the form of ATP. They can be homopolymers that are made of the same units or heteropolymers that are made of different units. They are the long chains that have bondings between them.

Complete step by step answer: Glycogen is a homopolysaccharide but is different from the starch as glycogen is highly branched. Glycogen serves as a source of energy. It is a polysaccharide which gives glucose and maltose on hydrolysis. Glycogenesis is the process of formation of glycogen, it is stimulated by the insulin hormone. When the blood glucose level becomes very low in the body, breakdown of glycogen molecules present in the liver and muscle starts. The process of breaking down glycogen molecules to form glucose is termed as glycogenolysis.
i. Galactose units: The galactose with glucose units make the lactose molecule. Galactose is the precursor of the glucose and is transformed in the liver.
ii. Ribose units: Ribose is the sugar unit present in the RNA.
iii. Amino acids: Amino acids are the units for making the proteins. These proteins can further act as enzymes.
Hence, the correct answer is option A.

Note: Liver has the deposited fat in them in the form of glycogen. It detoxifies the various metabolites in the body. Conversion of glucose to glycogen is an anabolic process as it will need energy in the form of ATP to produce glycogen. It will be stored as fats in the body which can be consumed when the body needs energy.