AIIMS2001BotanyCell - The Unit of Life
Assertion : Plasma membrane is exceedingly thin and not visible as a separate layer. Reason : It appears merely as a surface layer of cytoplasm.
Options
- AIf both Assertion and Reason are true and Reason is the correct explantion of Assertion
- BIf both Assertion and Reason are true and Reason is not the correct explanation of Assertion
- CIf Assertion is true but Reason is false
- DIf Assertion is false but Reason is true.
Correct answer
B. If both Assertion and Reason are true and Reason is not the correct explanation of Assertion
Step-by-step solution
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.