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The plasma membrane is selectively permeable because it
ABlocks every dissolved substance at all times
BLets every dissolved substance pass without limit
CLets some substances pass while blocking others
DLets only solids pass while liquids are blocked
Answer & Solution
Correct answer: C. Lets some substances pass while blocking others
1. The chapter section 2.7.1 describes the plasma membrane.
2. It has fine pores and is made of lipoproteins.
3. It permits some solutes to pass and stops others.
4. This selective control is selective permeability.
_Source: Selina Concise Biology Class 9, Ch 2 Cell, the Unit of Life (Mistral OCR'd PDF), section 2.7.1 Cell Membrane_
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