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The lipid bilayer of a cell allows for selective permeability. This means that only the substances that are allowed to get in and out can pass through the lipid layer.

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The plasma membranes of all known cells are largely composed of what class of macromolecules?

The plasma membranes of cells are largely composed of lipids, specifically phospholipids. These phospholipids form a bilayer structure that provides a barrier for the cell, regulating the passage of molecules in and out of the cell.


Which biomolecule is fundamental to function of biological membranes such as cell membranes?

lipids?


Biological membranes are primarily composed of?

Lipids. Naturally there are many different types.


Which type of organic compound is generally not soluble in water and makes up an important part of biological membranes?

Lipids are generally not soluble in water and are an important component of biological membranes. They are composed of long hydrocarbon chains that make them insoluble in water but highly important for maintaining the structure and function of cell membranes.


Are carbohydrates lipids proteins or nucleic acids important parts of biological membranes?

Lipids :)


What cells are found in membranes?

Membranes surround cells. There are no cells found in membranes. Membranes are composed mostly of lipids.


Does biological molecules proteins and lipids have cell membranes?

Proteins and lipids don't have cell membranes but are the molecules that make up the bulk of what a cell membrane is.


What is an organic compound called called that is used to store energy and forms important parts of biological membranes?

Lipids are insoluble in water and found in biological membranes.


What are the roles of lipids?

Lipids can be used to store energy. Some lipids are important parts of biological membranes and water proof coverings.


What are the major lipids in biological membranes?

Phospholipids


What is an organic compound called that is used to store energy and froms important parts of biological membranes?

Both lipids and sugars are impotent to membranes. Membranes are composed of phospholipids. They also contain glycoproteins, proteins that use sugars to help in communication between cells and identification.


Myelin is largely composed of?

Myelin is largely composed of lipids, particularly phospholipids and cholesterol. These lipids form a sheath around the axons of neurons, providing insulation and enhancing the speed at which electrical signals can travel along the neurons.