Which natural polymer makes up paper?
A. starch
B. nylon
C. wool
D. rubber
The Correct Answer and Explanation is:
The correct answer is:
A. Starch
Explanation:
Paper is primarily composed of cellulose, a natural polymer found in the cell walls of plants. Cellulose is an organic compound and a structural component in plants, helping them maintain shape and stability. Since paper is derived from wood pulp or other plant fibers, cellulose makes up the majority of its structure. However, starch, another natural polymer, plays a supporting role in paper manufacturing.
Starch, composed of long chains of glucose molecules, is a carbohydrate produced by plants and is commonly used as an additive in the papermaking process. Its primary function in paper production is as a surface treatment or coating. When applied to the surface of paper, starch helps improve the strength and smoothness of the final product, enhancing qualities like printability and writing smoothness. This is important in making paper strong enough to withstand handling and printing without tearing easily. Starch also increases paper’s opacity and reduces the tendency of ink to “bleed” or spread across the page, which is essential for clear and precise printing.
While other options like nylon, wool, and rubber are also polymers, they are not used in paper production. Nylon is a synthetic polymer known for its strength and elasticity, used primarily in textiles. Wool is a natural polymer derived from the hair of animals like sheep, mainly used in clothing. Rubber is a natural polymer obtained from latex in certain plants and is widely used in the production of elastic products but has no application in paper manufacturing.
In summary, cellulose forms the primary natural polymer structure of paper, while starch acts as a secondary polymer that enhances the paper’s surface properties and printability. Together, these natural polymers make paper a durable and versatile product widely used for writing, printing, and packaging.