Cotton, wool, silk are examples of ____________ ?
Correct answer: C. Natural Fibres
- A. Plant Fibres
- B. Animal Fibres
- C. Natural Fibres
- D. Synthetic Fibres
Explanation
Cotton, wool and silk are all natural fibres because they are obtained from living organisms or their products rather than manufactured chemically. Students may choose animal fibres because wool and silk are animal-derived, but cotton is a plant fibre, so natural fibres is the shared category.
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About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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