All of the following are examples of fibrous proteins except:
Correct answer: B. Myoglobin
- A. Silk fiber
- B. Myoglobin
- C. Keratin
- D. Fibrin
Explanation
Myoglobin is the correct answer because it is a globular protein, characterized by a compact and spherical structure, in contrast to fibrous proteins which are elongated and strand-like. Silk fiber, keratin, and fibrin are fibrous proteins that play structural roles in biological tissues. Silk fiber is used for structural strength in silk, keratin is found in hair and nails, and fibrin is involved in forming blood clots.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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