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Question

Plasma membrane is a __________ membrane.

A
Permeable
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B
Selectively permeable
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C
Impermeable
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D
None of the above
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Solution

The correct option is B Selectively permeable
A. Permeable means a material that can allow anything to pass through it.
B. Selectively permeable means a material that allows certain molecules or ions to pass through it.
C. Impermeable means any material through which no molecule can pass.
D. Semi permeable means a material through which only a limited type of molecules can pass.
Plasma membrane is selectively permeable as it allows certain molecules to pass through it and the size of molecules doesn't affect the permeability of the membrane.
So, the correct answer is the option (B) 'Selectively permeable'.

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