Moderate

Choline is a component of:

Correct answer: A. Phospholipids

  • A. Phospholipids
  • B. Phosphatidic acid
  • C. Terpenoids
  • D. Waxes

Explanation

Choline is an essential nutrient that is often incorporated into phospholipids, specifically phosphatidylcholine, which is a critical component of cell membranes. This makes Option A correct. Phosphatidic acid serves as a precursor for various phospholipids but does not itself contain choline, which makes Option B incorrect. Terpenoids and waxes, represented by Options C and D, respectively, are structurally and functionally distinct classes of biological molecules that do not include choline.

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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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