Most of the cellular secretions are protein in nature:
Correct answer: D. Glycoprotein
- A. Protein
- B. Lipid
- C. Carbohydrate
- D. Glycoprotein
Explanation
The correct answer is glycoproteins. Glycoproteins are proteins with carbohydrate groups attached and play a crucial role in cellular secretions, such as mucus and cell signalling molecules. While proteins and lipids are important biological molecules, they do not primarily constitute cellular secretions. Carbohydrates alone do not form the main component of secretions either.
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About Biological Molecules
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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