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Question: Answered & Verified by Expert
Assertion : Plasma membrane is exceedingly thin and not visible as a separate layer.
Reason : It appears merely as a surface layer of cytoplasm.
BiologyCell - The Unit of LifeAIIMSAIIMS 2001
Options:
  • A If both Assertion and Reason are true and Reason is the correct explantion of Assertion
  • B If both Assertion and Reason are true and Reason is not the correct explanation of Assertion
  • C If Assertion is true but Reason is false
  • D If Assertion is false but Reason is true.
Solution:
1293 Upvotes Verified Answer
The correct answer is: If both Assertion and Reason are true and Reason is not the correct explanation of Assertion
All cells are bounded by a thin membrane called the plasmalemma. This membrane is not seen under light microscope as separate layer. It has no cell cement and thus it is very thin. It has structural proteins, enzymes and carrier proteins.

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