Question

Which of the following are natural polymers?
This question has multiple correct options.
A. Proteins.
B. Cellulose.
C. Teflon.
D. Natural fibre.

Answer 1

To solve this question, we have to remember that the term polymer is defined as very large molecules having high molecular masses $\left( {{{10}^3} - {{10}^7}u} \right)$ and the polymers that are found in plants and animals are known as natural polymers.

Complete step by step answer:
Here, we have to find which of the given molecules are natural polymers.
So,
1. Proteins – Proteins are the most abundant biomolecules in the living system. Chief sources of proteins are mile, cheese, pulses, peanuts, fish etc. They are found in every part of the body and form the fundamental basis of structure and functions of life. Hence, we can say that all proteins are natural polymers.
2. Cellulose – Cellulose occurs exclusively in plants and it is the most abundant organic substance in the plant kingdom. It is a predominant constituent of cell wall of plant cells. Hence, cellulose is also a natural polymer.
3. Teflon – Teflon is manufactured by heating tetrafluoroethene with a free radical or persulfate catalyst at high pressures. It is an example of addition polymers. Hence, it is not a natural polymer.
4. Natural fibre – Natural fibre are the fibres that are produced by plants, animals and geological processes. Hence, they are natural polymers.
Hence, we can say that proteins, cellulose and natural fibre are natural polymers.
So, the correct answer is “OptionA, B and D”.

Note: The repeating structural units that are derived from simple and reactive molecules are known as monomers and are linked to each other by covalent bonds. The process by which polymers are formed from their respective monomers is called polymerisation. The polymers that are formed by the natural polymers are called synthetic polymers. For ex – Buna S, Buna N, nylon 6-6 etc.