True about lipid bilayer of cell wall
A. Asymmetrical arrangement of cell wall componentB. Lateral diffusion
C. Symmetrical arrangement of cell wall components
D. Not made up of amphipathic lipids
E. it is permeable to ions and other water soluble molecules
The Answer
is. (A) Asymmetrical arrangement of
cell wall component; (B) Lateral diffusion:
• Membranes have inside-outside asymmetry or transverse
asymmetry. The causes:
— Asymmetric distribution of lipids in two monolayers
— Asymmetric locations of protein and oligosaccharides
— Asymmetric orientation of transmembrane proteins
across the bilayer
• There is regional asymmetry in membrane.
• Lipids are amphipathic
in nature
• Movement of membrane lipids in the lipid bilayer are
— Lateral diffusion
— Rotation
— Flexion
— Flip-flop
* The lipid bilayer is particularly impermeable to
most water soluble or hydrophilic moleciules and ions, to maintain the electrical potential
and regulate ion concentrations across membranes
