Globular proteins differ from fibrous proteins in:
Correct answer: B. Being soluble in aqueous medium
- A. Having amino acids
- B. Being soluble in aqueous medium
- C. Their repeating units are joined by a peptide bond
- D. Being non-crystalline
Explanation
Globular proteins are characterized by their spherical shape and are typically soluble in aqueous solutions due to their hydrophilic exterior. This solubility is crucial for their roles in metabolic processes, such as enzymes and antibodies. In contrast, fibrous proteins are generally insoluble and have structural roles, such as providing support and strength to tissues. Options A and C are incorrect because both types of proteins consist of amino acids joined by peptide bonds. Option D is incorrect because being non-crystalline is not a defining feature of globular proteins.
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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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