Membranes are held together by hydrophobic interactions
Proteins and lipids can move around laterally on one layer but rarely flip to the other side
Some move along the cytoskeleton fibers
Membrane remains fluid as temperature decreases until the phospholipids settle into a closely packed arrangement
Membrane remains fluid longer if there are more phospholipids with unsaturated hydrocarbon tails
Separated more because of the kinks in the tails
Cholesterol
At higher temperatures, it makes the membrane less fluid
Restrains phospholipid movement
Lowers the temperature required for membranes to solidify because they are packed less tightly
Temperature buffer
One is through turgidity. This occurs before ground tissue ( collenchyma
and sclerenchyma cells) become well
developed to give structural support to the plant as it grows bigger. The xylem
tissue (composed of rigid tissue) of the young
plant helps render this support and also maintaining osmotic turgidity of the surrounding
plant cells.
The role of proteins in a
chromosome is for gene transfer. The gene transfer found in the DNA happens
during mitosis.
