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Question
Cell wall is
Cell wall is
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Solution
The correct option is C freely permeable
The cell wall is said to be freely permeable as it allows all substances to pass through it (there's a size exclusion which is 30-60 kDa, kilodalton - the unit of mass).
An impermeable layer (such as cork cells lined with suberin) does not allow any molecules to pass through it.
A semi permeable barrier or a differentially permeable membrane allows some molecules to pass through and restricts other molecules. Water molecules pass through the differentially permeable membrane always.
The cell wall is said to be freely permeable as it allows all substances to pass through it (there's a size exclusion which is 30-60 kDa, kilodalton - the unit of mass).
An impermeable layer (such as cork cells lined with suberin) does not allow any molecules to pass through it.
A semi permeable barrier or a differentially permeable membrane allows some molecules to pass through and restricts other molecules. Water molecules pass through the differentially permeable membrane always.
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