Lipid bilayer makes the membrane differently permeable barrier that allows the transport of:
Correct answer: C. Non-polar materials
- A. Ionic materials
- B. Polar materials
- C. Non-polar materials
- D. Glycoproteins
Explanation
The lipid bilayer of the plasma membrane is composed mainly of phospholipids, which have hydrophobic tails and hydrophilic heads. This structure creates a barrier that is selectively permeable. Non-polar materials can dissolve in the hydrophobic core of the bilayer, allowing them to pass through easily. In contrast, ionic and polar materials, such as ions and polar molecules, are repelled by the hydrophobic core and require specific transport proteins to facilitate their movement across the membrane. Glycoproteins, being large and complex, also require specialized transport mechanisms.
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