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Anonymous
Phospholipid bilayer (types of phospholipids are Sphingomyelin, Sphingoethanolamin, Sphingoserin, Phosphatidylcholine, Sphingocholine).
In between the phospholipds you also find cholesterol and intermembrane protein.
Rhett Strosin ∙
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Yes -- plant cells have cell walls made of cellulose, instead of cell membranes.
Proteins.
Yes, hydrophobic molecules can cross cell membranes because cell membranes are made up of a phospholipid bilayer that is permeable to nonpolar molecules like hydrophobic ones.
No, fats are not the major material from which cell membranes are made. Cell membranes are primarily composed of phospholipids, which have a lipid component but also include a phosphate group. While dietary fats can contribute to the lipid portion of cell membranes, they are not the major material used for their construction.
Animal cells do not have cell walls--only cell membranes. All cells have cell membranes made of a phospholipid bilayer. Cell walls, which are located outside of a cell's membrane, are made of various materials depending on the type of cell. They are found in plants (cellulose), fungi (chitin) and bacteria (peptidoglycan).
Cheetahs do not have cell walls. However, like all living organisms, they have cell membranes that surround and protect their cells. Cell membranes regulate the passage of substances in and out of the cell.
The cell membrane and the membranes of all of their organelles are made of phospholipids.
endoplasmic reticulum
Cell membranes are made up of proteins called PHOSPHOLIPID BILAYER It has phosphate molecules attached to the proteins There is also CHOLESTEROL in the cell membrane to make it more fluid