The hydrophilic end of the phospholipid molecule is polar because of the presence of:
Correct answer: D. Phosphate group
- A. Glycerol
- B. Amine group
- C. Fatty Acid
- D. Phosphate group
Explanation
The phosphate group (-PO₄³⁻) in phospholipids is part of the molecule's hydrophilic head. It connects the glycerol backbone to a polar group (like choline, serine, or ethanolamine) and carries a negative charge, making it highly polar. This polarity allows the phosphate group to interact with water and other polar substances, contributing to the formation of the lipid bilayer in cell membranes. The phosphate group plays a key role in maintaining membrane structure and function.
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About Lipids
Lipids include fats, oils, waxes, phospholipids and steroids, which are largely insoluble in water and soluble in organic solvents. Coverage includes glycerol and fatty acids, ester bond formation, saturated and unsaturated fats, triglyceride functions, and phospholipids in cell membranes.
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