Lipids, Fats, and Biochemistry

Immunoglobulins are proteins that belong to the globulin class of serum proteins. They are named for their structural classification as globular proteins involved in immune responses.

Lipopolysaccharides (LPS), also known as lipoglycans, are large molecules consisting of a lipid and a polysaccharide joined by a covalent bond; they are found in the outer membrane of gram-negative bacteria, act as endotoxins and elicit strong immune responses in animals.

Phosphatidic acids (PAs) are the acid forms of phosphatidates, a part of common phospholipids, major constituents of cell membranes. Phosphatidic acids are the simplest diacyl-glycerophospholipids.

Sphingosine is an 18-carbon amino alcohol with an unsaturated hydrocarbon chain, which forms a primary part of sphingolipids, a class of cell membrane lipids that include sphingomyelin, an important phospholipid.

Sphingolipids are a class of lipids derived from the aliphatic amino alcohol sphingosine. These compounds play an important role in signal transmission and cell recognition.

Intermediate-density lipoprotein belongs to the lipoprotein particle family and is formed from the degradation of very low-density lipoproteins. IDL is one of the five major groups of lipoproteins (chylomicrons, VLDL, IDL, LDL and HDL) that enable fats and cholesterol to move within the water-based solution of the bloodstream.

Sulfatides are a class of sulfated galactosylceramides synthesized primarily in the oligodendrocytes in the central nervous system. Sulfatides are a type of sulfolipid.

Apolipoprotein B is the primary apolipoprotein of low-density lipoproteins which is responsible for carrying cholesterol to tissues.

Prokaryotic plasma membrane contains phospholipids as the major component.

Muramic acid is present in the bacterial cell wall and therefore it is not the constituent of plasma membrane.

This is the correct option. The cell membrane does not consist of vitamins.

The correct answer is option (1).

The prostaglandins (PG) are a group of physiologically active lipid compounds having diverse hormone-like effects in animals.

 Adipose tissue or fat is an anatomical term for loose connective tissue composed of adipocytes. Its main role is to store energy in the form of fat, although it also cushions and insulates the body.

The correct option is (2). Urea is produced by the metabolism of proteins.