Question

Is it true that the flexible nature of a cell membrane results from its channel proteins

Answer 1

I think you'll find that the molecules of the lipid bilayer can move relative to eachother, giving a fluid -like surface. Molecules are often associated in the membrane in "lipid rafts". This is a useful analogy - molecules don't float exactly but they can bob up and down a bit. They tend to group together due to hydrophobic interactions - transmembrane proteins will have a hydrophobic transmembrane domain (TM) which sits in the bilayer.

Answer 2

membrane without channel proteins also very flexible, eg, micelle formed from lipid bilayer ( in the sense of physical flexibility).

Answer 3

Thank you so much!