what two things are the cell membrane made up of?

Answer 1

There are two classes of molecules that make up the cell membrane. These are lipids and proteins.
Lipids constitute the two layers called bilyer. A lipid has two ends. One is called head and the other tail.The former is hydrophilic and the latter is hydrophobic.The lipid molecules are arrayed in such a manner that the tails face each other while the heads are away.The heads are in contact with cytoplasm on the one hand and exterior on the other.The the heads interact electrostatically with proteins. Some proteins are buried in the bilayer, and some even project beyond the bilayer on both the surfaces. Carbohydrates are over-layered, that is, on the outer side of this complex. Some lipids are phophorylated. Cholesterol is also present in some quantity in the membrane.

Answer 2

A cell membrane, plasma membrane or plasmalemma is a selectively permeable lipid bilayer coated by proteins which comprises the outer layer of a cell. The plasma membrane works between the machinery on the inside of the cell and the outside fluid that bathes the cells. The plasma membrane lets nutrients into the cell such as glucose, amino acids, and lipids. It is a semi-fluid patchwork of molecules, some of which are constantly diffusing through the membrane. This mobility is due to the flexible proteins and oily phospholipids that make up most of the membrane's chemical structure. Carbohydrates attached to the proteins and phospholipids form glycoproteins and glycolipids. It consists of, among other components, phospholipid and protein molecules which separate the cell interior from its surroundings within animal cells, and control the input and output of the cell through the use of receptor and cell adhesion proteins, which also play a role in cell behavior and the organization of cells within tissues. Plasma membranes is also known as an asymmetric fluid mosaic structure.

The outer cell membrane and the membranes surrounding inner cell organelles are phospholipid bilayers. To perform the function of the organelle, the membrane is specialized in that it contains specific proteins and lipid components that enable it to perform its unique roles for that cell or organelle. In the cell membrane, phospholipid molecules create a spherical three dimensional lipid bilayer shell around the cell. A phospholipid molecule is composed of a head and two tails. The circle, or head, is the negatively charged phosphate group and the two tails are the two highly hydrophobic fatty acid chains of the phospholipid. The plasma membrane consists of 1/3 cholesterol and 2/3 phospholipids (65-80%) and sphingolipids (20-35%). The outer leaflet contains 5% glycolipids.

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Answer 3

They are ade up of more than two things, but the main component is the phospholipid bilayer, which is basically the cell's outermost layer. This then contains proteins, which can be used for signalling, and transfer of molecules, proteins ions, etc.

In more detail, some of the proteins and even the phosopholipids are glycosylated (have sugars covalently attached), and there are sterols like cholesterol to keep the bilayer fluid instead of rock hard.

Answer 4

I don't know what level of biology you are in but the composition of the cell membrane includes a phospholipid bilayer, proteins, cholesterol, and carbohydrates.

Answer 5

Phospholipids, carbohydrates, proteins

Answer 6

protein and fat

Answer 7

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