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The cell membrane of a cell is said to be semi-... - WAEC Biology 1995 Question

The cell membrane of a cell is said to be semi-permeable because
A
it allows only large molecular substances to pass through it into the cell
B
it is actively involved in energy production in the cell
C
it actively allows all substances to pass through it by diffusion
D
it is actively selective in allowing substances pass through it
correct option: d
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