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Question: Answered & Verified by Expert
Which one of the following is correct for the transmembrane proteins in lipid bilayer of plasma membrane?
BiologyCell - The Unit of LifeAIIMSAIIMS 2016
Options:
  • A They are absent in animal cells.
  • B They act as channel proteins.
  • C They are absent in plant cells.
  • D They are only externally located.
Solution:
2081 Upvotes Verified Answer
The correct answer is: They act as channel proteins.
The tunnel proteins or transmembrane proteins run throughout the lipid bilayer and individually or in group form channels for the passage of water and water soluble substances. The channels however, possess selective properties for passage of different ions and other polar substances.

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