Cotton is almost pure
Cotton is almost pure
- A) starch
- B) protein
- C) animal fibre
- D) cellulose
Correct Answer: D) cellulose
Explanation
The question is asking about the composition of cotton. Cotton is a natural fiber that is widely used in the textile industry for making clothes, bed sheets, and other household items. The question is asking which substance is almost pure in cotton.
From the options given, the correct answer is option D: cellulose. Cellulose is a complex carbohydrate that is found in the cell walls of plants. It is the main component of cotton fiber and accounts for about 90% of its weight. Cellulose is made up of long chains of glucose molecules that are linked together by chemical bonds.
Starch, option A, is another complex carbohydrate found in plants, but it is not the main component of cotton fiber. Protein, option B, is a macromolecule composed of amino acids and is not found in cotton fiber. Animal fiber, option C, refers to fibers obtained from animal sources such as wool, silk, and fur, and is not related to cotton fiber.
Understanding the composition of cotton is important in various industries such as textiles, fashion, and agriculture. Knowledge of cellulose and its properties is also important in fields such as biochemistry and material science.