The Endoplasmic reticulum. The Rough ER is involved in protein synthesis (ribosomes are attached to the surface, giving it a 'rough' appearance), and the Smooth ER is involved in lipid (and other) production.
Our plasma membrane and organelles are bound by phospholipid bilayer. Proteins embedded in phospholipid bilayer have hydrophilic and hydrophobic nature. Plasma membrane have selective permeable property.
The double layered sheets are usually referred to as a phospholipid bilayer. Each phospholipid is composed of two fatty acid chains, a glycerol molecule, a phosphate group, and usually another polar molecule is attached to the phosphate group.
Smooth endoplasmic reticulum
Endoplasmic Reticulum or ER.
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Lipids are organic compounds that are insouluble in water and includes fats, oils, and waxes. Lipids are used to make cell membranes and steroid hormones and to store energy.
No. Amino acids are the building blocks of proteins, which are in a different category than are lipids, which can also be classified as fats. Examples of lipids are phospholipids (in cell membranes), steroids, glycerols and fatty acids, and cholesterol. If you want to know more about the role of amino acids in Protein synthesis (because this is why they exist at all--to make protein), then I would look at this presentation: http://www.wisc-online.com/objects/index.asp?objID=AP1302
Lipids are molecules themselves. It doesn't make sense to ask what molecules "make them up." But there are atoms that make up lipids. These atoms are carbon, hydrogen, and oxygen. There are also four kinds of lipids, these are phospholipids, steroids, fats, and waxes.
The envelopeThe envelope isn't even part of any cell. The Golgi Apparatus is the correct answer. The Golgi uses vesicles to transport waste, nutrients (anything that needs transporting out of the cell) to the cell membrane. Stuff that goes into the Golgi apparatus goes in the cis- side and comes out the trans- side in vesicles.
amino acids
Endoplasmic Reticulum
Endoplasmic Reticulum
Proteins and lipids don't have cell membranes but are the molecules that make up the bulk of what a cell membrane is.
The smooth endoplasmic reticulum contains enzymes that synthesize lipids that are used to make membranes.
phospholipids
phospholpipids.
Phospholipids
Phospholipids
Lipids, or fat.
Lipids, or fat, is used to insulate the body and found in all cell membranes. Fats have insulating capacity, but they are bad conductors of heat.
Lipids are insoluble in water and found in biological membranes.
membranes are made of lipids because substances that dissolve in lipids enter cells more rapidly than lipid-insoluble substances