Which types of molecules are the MAJOR structural components of the cell membrane?Enter Question...
Phospholipids and proteins
True or False: According to the fluid mosaic model of cell membranes, membrane phospholipids can move laterally along the plane of the membrane.
What is one of the ways that the membranes of winter wheat are able to remain fluid when it is extremely cold?
by increasing the percentage of unsaturated phospholipids in the membrane
When a membrane is freeze-fractured, the bilayer splits down the middle between the two layers of phospholipids. In an electron micrograph of a freeze-fractured membrane, the bumps seen on the fractured surface of the membrane are :
Membrane spanning proteins
How do unsaturated fatty acids help keep a membrane more fluid at lower temperatures?
The double bonds form bends or kinks in the fatty acid tails, forcing adjacent lipids to be further apart.
Which type of molecules cannot pass through the phospholipids of the plasma membrane? And how do they pass through?
Ions, such as hydrogen ions, and hydrophilic molecules, such as water and glucose, cannot pass directly through the phospholipids of a plasma membrane. They must pass through membrane transport proteins.