Why must all living cells carefully regulate the fluidity of their membranes?
A. to permit membrane lipids and proteins to diffuse from their site of synthesis to other regions of the cell
B. to allow cells to function at a broad range of temperatures
C. to ensure that membrane molecules are distributed evenly between daughter cells when a cell divides
D. to allow membranes, under appropriate conditions, to fuse with one another and mix their molecules
E. to constrain and confine the movement of proteins within the membrane bilayer
Ans:
A. to permit membrane lipids and proteins to diffuse from their site of synthesis to other regions of the cell
C. to ensure that membrane molecules are distributed evenly between daughter cells when a cell divides
D. to allow membranes, under appropriate conditions, to fuse with one another and mix their molecules
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