Which of the following is a fibrous protein?
Correct answer: C. Collagen
- A. Haemoglobin
- B. Insulin
- C. Collagen
- D. Amylase
Explanation
Collagen forms long rope-like triple helices that give strength to skin, tendons and bone, the hallmark of fibrous proteins. Haemoglobin, insulin and amylase are compact, soluble globular proteins built for transport, signalling and catalysis rather than for strength.
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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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