Read the passage carefully and answer the questions.

Biomolecules are the organic compounds present as an essential constituents of living organisms in different cells. The molecules are generally termed as macromolecules, which are carbohydrates, enzymes, nucleic acids, amino acids and proteins etc. Carbohydrates are classified as sugars and non-sugars include sucrose, glucose, fructose, starch and cellulose. Enzymes are coordinated with various chemical reactions in nucleic acid. Nucleic acids are found in living organisms made up of proteins and natural polymers. Two types that are generally found in biological systems are DNA and RNA nucleic acid. Amino acids are bifunctional groups of carboxyl and amino groups. Proteins are a class of biologically important compounds. They are crucial to virtually all processes in living systems. Some of them are hormones, which serve as chemical messengers that coordinate certain biochemical activities.

Starch is a polymer of saccharides known as

Glucose

The correct answer is Option (1) → Glucose

Starch is a polysaccharide formed by repeated units of $α$-D-glucose.

Explanation

Option 1: Glucose

Starch is composed of many glucose units joined together through glycosidic bonds. It exists mainly as amylose and amylopectin, both formed from $α$-glucose molecules.

Option 2: Fructose

Fructose is a monosaccharide commonly found in fruits. It does not form starch.

Option 3: Sucrose

Sucrose is a disaccharide composed of glucose and fructose. It is not a polymer and hence cannot form starch.

Option 4: Cellulose

Cellulose is also a polymer of glucose but formed from $β$-glucose units. It is structurally different from starch and serves as a structural component in plants.