Keeping in view the 'fluid mosaic model' for | vedclass

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(D) The correct answer is $D$.According to the 'fluid mosaic model',the cell membrane exhibits rapid internal motion involving flexing within each lip

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While lipids can rarely flip-flop,proteins cannot.

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(D) The correct answer is $D$.According to the 'fluid mosaic model',the cell membrane exhibits rapid internal motion involving flexing within each lipid molecule.$A$ rapid lateral diffusion of lipids within the same monolayer is possible.$A$ slow 'flip-flop' motion,i.e.,the transfer of lipid molecules from one side of the bilayer to the other,is rare but possible.In contrast,proteins are generally too large and amphipathic to undergo 'flip-flop' movement across the lipid bilayer,as this would require the hydrophilic regions of the protein to pass through the hydrophobic core of the membrane,which is energetically unfavorable.

Keeping in view the 'fluid mosaic model' for the structure of the cell membrane,which one of the following statements is correct with respect to the movements of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?

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