A fat molecule has three fatty acids. A phospholipid molecule has how many fatty acids?
Correct answer: C. 2
- A. 3
- B. 1
- C. 2
- D. 0
Explanation
A phospholipid molecule is a type of lipid that forms the basic structure of cell membranes. It contains two fatty acids attached to a glycerol backbone, whereas a triglyceride (fat molecule) has three fatty acids attached. The glycerol in phospholipids is also bonded to a phosphate group, which is not the case in triglycerides. Therefore, the correct answer is that a phospholipid has 2 fatty acids. Options indicating 0, 1, or 3 fatty acids are incorrect because they do not align with the typical structure of a phospholipid.
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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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