Assertion :A cell membrane shows fluid-mosaic behaviour. Reason: A membrane is composite of lipids and proteins.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The structure of the cell membrane can be described by the fluid-mosaic model, given by Singer and Nicolson (1972). According to them, the cell membranes are considered to be quasi-fluid structures in which the lipids and proteins are in a mosaic manner. This model considered the lipid-protein association to be hydrophobic. The fluidity of the membrane is the result of this hydrophobic interaction
Hence a cell membrane shows fluid behavior because a membrane is a mosaic or composite of diverse lipids and proteins.
So, the correct answer is A 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'

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