The non-polar region of a phospholipid molecule consists of:
Correct answer: D. Fatty acids
- A. Glycerol
- B. Choline
- C. Phosphoric acid
- D. Fatty acids
Explanation
Phospholipids are crucial components of cell membranes, featuring a unique structure with a hydrophilic (water-attracting) head and hydrophobic (water-repelling) tails. The head consists of glycerol and a phosphate group, which are polar, whereas the tails are composed of fatty acids, which are non-polar. This non-polar characteristic of the fatty acid tails is what allows them to repel water, forming the non-polar region necessary for the self-assembly of the phospholipid bilayer in cell membranes. Glycerol and phosphoric acid are both part of the polar head. Choline, if present, also contributes to the polar head. Fatty acids alone form the non-polar region, making Option D the correct choice.
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