Steroids are natural:
Correct answer: C. Lipids
- A. Lipoproteins
- B. Proteins
- C. Lipids
- D. All of these
Explanation
Steroids are classified as lipids because they are hydrophobic and insoluble in water, with a structure based on four fused carbon rings. This structure is distinct from proteins, which are composed of long chains of amino acids, and lipoproteins, which are complexes that transport lipids in the bloodstream. Therefore, the correct answer is that steroids are lipids.
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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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