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Question

Assertion :Organisms are made up of cells. Reason: Cells are structural unit of living organisms. A cell keeps its chemical composition steady within its boundary.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
A cell is the structural and functional unit, of all organisms that serve as a building block of all organisms (both unicellular and multicellular) and is capable of carrying out all life processes. All cells are delimited by plasmalemma/cell membrane, which is a biological membrane that separates the cell’s interior from surrounding and from other cells. Being selectively permeable layer, cell membrane allows the exchange of desired molecules only thereby maintaining the unique chemical composition of cell’s interior. Thus, the correct answer is option A.

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