Why is cellulose considered to be a complex carbohydrate?

Hint: The most frequent type of biological compound is carbohydrate. The monosaccharide, which has six carbon atoms, is the most basic building component of carbohydrates. Sugars are sweet, short-chain, soluble carbohydrates that provide humans with energy and can be found in a variety of foods. Simple sugars, like glucose, are made up of only one monosaccharide. Disaccharides are sugars that are made up of two monosaccharides, such as sucrose or table sugar.

Complete answer:
Cellulose is classified as a complex carbohydrate since it has more than two units of sugar linked together.
Cellulose is a polysaccharide. This suggests it's made up of smaller, interconnected units. Monomers are the little units in question. Glucose is the primary monomer in cellulose. Cellulose is made up of hundreds to thousands of (14) connected D-glucose units, often known as monomers.

Polysaccharides are complex carbohydrates. This means they're made up of several monosaccharides, or single sugars, strung together in lengthy chains. One of the most frequent monosaccharides found in living beings is glucose.

The most frequent type of biological compound is carbohydrate. Sugars and starches are among them. Carbohydrates are employed for a variety of purposes, including providing and storing energy. Carbohydrates, like most biological compounds, are made up of small repeating units called monomers that create bonds with one another to build larger molecules called polymers. Monosaccharides are the tiny repeating units that make up carbohydrates. As depicted in the model of the monosaccharide glucose below, each monosaccharide has six carbon atoms.

Note:-
Sugars are sweet, short-chain, soluble carbohydrates that can be found in a variety of meals. In living organisms, their job is to provide energy. A single monosaccharide makes up the simplest sugars. Glucose, fructose, and galactose are among them. Glucose is a simple sugar that is used by living organisms' cells for energy. Fructose, a simple sugar found in fruits, and galactose, a simple sugar found in milk, are two examples of simple sugars.