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Question

Assertion :Larger cells are less efficient. Reason: Surface to volume ratio is more in large cells.

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 C Assertion is correct but Reason is incorrect
  • The surface area of cells determines the exchange of materials. The increase in the volume of the cell increases its metabolic activity.
  • However, the surface area does not increase correspondingly with the volume. Therefore, larger cells are less efficient.
  • The surface to volume ratio decreases with the increase in cell size. All passive cells like eggs are, therefore, larger in size.

Thus, the correct answer is option C.


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