Question

20. Give the composition and role of the plasma membrane?​

Answer 1

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Plasma membrane is composed of phospholipid bilayer with embedded proteins.

It is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

Hope it helps....

Answer 2

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$here \: is \: your \: answer..$

Composition and role of

Plasma Membrane ==>

•The plasma membrane (also known as the cell membrane or cytoplasmic membrane) is a biological membrane that separates the interior of a cell from its outside environment.

•It is a fluid mosaic of lipids, proteins and carbohydrate.

•The plasma membrane is impermeable to ions and most water-soluble molecules.

•They cross the membrane only through transmembrane channels, carriers, and pumps.

•These transmembrane proteins provide the cell with nutrients, control internal ion concentrations, and establish a transmembrane electrical potential.

•A single amino acid change in one plasma membrane pump and Cl− channel causes the human disease cystic fibrosis.

•The cell membrane is primarily composed of a mix of proteins and lipids.

•While lipids help to give membranes their flexibility, proteins monitor and maintain the cell’s chemical climate and assist in the transfer of molecules across the membrane.

•The fundamental structure of the membrane is the phospholipid bilayer, which forms a stable barrier between two aqueous compartments.

•The plasma membrane is composed of a phospholipid bilayer, which is two layers of phospholipids back-to-back.

•Phospholipids are lipids with a phosphate group attached to them.

•The phospholipids have one head and two tails.

•The head is polar and hydrophilic, or water-loving.

•The tails are nonpolar and hydrophobic, or water-fearing.

$hope \: \: this \: \: helps.$