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Question
Assertion :Plasmolysis will be severe if the process is in the order, limiting → incipient → evident Reason: Plasmolysis is exosmosis
Assertion :Plasmolysis will be severe if the process is in the order, limiting → incipient → evident Reason: Plasmolysis is exosmosis
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Solution
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Shrinkage of the protoplast of a cell from its cell wall under the
influence of a hypertonic solution is called plasmolysis. Hypertonic
solution causes exosmosis or withdrawl of water from the central vacuole
of cell. The pressure on the wall is simultaneously reduced and the
elastic wall contracts causing a reduction in cell size. This is first
stage of plasmolysis called limiting plasmolysis. Initilly the
protoplast withdrawl itself from the corners. This stage is known as
incipient plasmolysis. Due to continued exosmosis, protoplast shrinks
further and withdrawal from the cell wall except at one or a few points.
It is known as evident plasmolysis. Cells cannot survive in such case.So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.
Shrinkage of the protoplast of a cell from its cell wall under the
influence of a hypertonic solution is called plasmolysis. Hypertonic
solution causes exosmosis or withdrawl of water from the central vacuole
of cell. The pressure on the wall is simultaneously reduced and the
elastic wall contracts causing a reduction in cell size. This is first
stage of plasmolysis called limiting plasmolysis. Initilly the
protoplast withdrawl itself from the corners. This stage is known as
incipient plasmolysis. Due to continued exosmosis, protoplast shrinks
further and withdrawal from the cell wall except at one or a few points.
It is known as evident plasmolysis. Cells cannot survive in such case.
So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.
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