Which statement is true about lipid bilayer of plasma membrane?
Correct answer: D. None of the above
- A. Permeable to large ionic polar molecules
- B. Permeable to small ionic molecules
- C. Permeable to only polar molecules
- D. None of the above
Explanation
The lipid bilayer of the plasma membrane is selectively permeable. It allows small, non-polar molecules such as oxygen and carbon dioxide to pass through easily. Small polar molecules like water can also cross the membrane via osmosis, but larger or charged molecules, such as ions and large polar molecules, typically require transport proteins to facilitate their passage. Hence, the correct answer is 'None of the above' because none of the first three options correctly describe the permeability of the lipid bilayer.
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