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Question
Given below are two statements.
Statement - I: Cell wall is freely permeable.
Statement - II: Płasma membrane is not selectively permeable.
Choose the correct answer from the options given below with reference to structure of root.
Options
Both Statement - I and Statement - II are correct.
Both Statement - I and Statement - II are incorrect.
Statement - I is correct but Statement - II is incorrect.
Statement - I is incorrect but Statement - II is correct.
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Solution
Statement - I is correct but Statement - II is incorrect.
Explanation:
The plant cell wall is generally porous, allowing the free passage of water and small solutes via the apoplast. The plasma membrane is selectively permeable, regulating which ions and molecules enter or leave the protoplast. In roots, the Casparian strip in the endodermis blocks the apoplastic route, forcing substances to cross the plasma membrane for selective uptake.
