The current model of cellular membranes is called PB and J s

The current model of cellular membranes is called PB and J sandwich molecular mosaic fluid mosaic plasma membrane Which characteristic apply to the phospholipid membrane? It is primarily a hydrophobic bilayer. Phospholipids are amphipathic Proteins are imbedded within the phospholipids. The imbedded molecules can move freely within the membrane All are important characteristics of the Cholesterol molecules in the membrane act to modulate temperature dependent viscosity and fluidity of the membrane. moderate the effects of a high fat diet promote fluidity in the membrane. allow for better membrane compaction and integrity. allow transport across the membrane. One important feature of membranes in the endomembrane system is that they can move freely from cell to cell. freely bleb off of and then onto other components of this network. they contain small pieces of independently replicating DNA. they move from the trans side of the membrane to the cis side. t

Solution

1. Fluid mosaic model.

Fluid mosaic model for plasma membrane proposed by Jonathan Singer and Garth Nicolson is universally acceoted model for plasma membrane.

2. All are important characteristics.

Phospholipid molecules are hydrophobic and amphipathic. Which means that posess polar head and non polar tails.

Some of the protien molecules are embedded in the phospholipid layer and these moelcules are free to move due to fluid nature of plasma membrane.

3. Allows better membrane compaction and integrity.

Cholesterol is an amphipathic molecule like phospholipids. It contains a hydrophilic and a hydrophobic portion. Cholesterol\'s hydroxyl (OH) group aligns with the phosphate heads of the phospholipids. The remaining portion of it tucks into the fatty acid portion of the membrane. Because of the way cholesterol is shaped, part of the steroid ring (the four hydrocarbon rings in between the hydroxyl group and the hydrocarbon \"tail\") is closely attracted to part of the fatty acid chain on the nearest phospholipid. This helps slightly immobilize the outer surface of the membrane and make it less soluble to very small water-soluble molecules that could otherwise pass through more easily.

4. They contain transport enzymes.