-
what is the family of biomolecules with seemingly unrelated structures?
Lipids
-
what is the greek word for lipids and its meaning?
lipos means fat or lard
-
Examples of lipids
fats, waxes, vegetable oils, steroids or fat-soluble vitamins
-
Functions of lipids
energy source, energy storage, cell membrane structural components, hormones, vitamins, vitamin absorption, protection and insulation
-
where are lipids stored in the body?
adipocytes
-
what are the basic structure of all cell membranes?
phosphoglycerides, sphingolipids, and steroids. These control the flow of molecules into and out of the body
-
what is the critical chemical messenger that allow tissues of the body to communicate with one another?
steroid hormones
-
classifications of lipids
simple lipids, compound lipids, terpenes and steroids
-
what are examples of simple lipids? what do they yield?
- fats and oils - yield fatty acids and glycerol
- waxes - yield fatty acids and long chain alcohol
-
what are examples of compound lipids? what do they yield?
- phospholipids - yield F.A., glycerol or sphingosine, phosphoric acid and an amino alcohol or amino acid
- glycolipids - yield fatty acids, sphingosine, and a carbohydrate upon hydrolysis
-
what are terpenes and steroids?
no F.A. and not soluble in water
-
what are other biologically important lipids?
prostaglandins, thromboxanes, and leukotrienes called eicosanoids
-
where do fats and oils come from? what do they come from?
fats come from animals and it contains greater proportion of saturated fatty acids (single bonds only). oils come from plants and it contains greater percentage of unsaturated fatty acids (one or more doubles bonds)
-
why are fats and oils call triglycerides or triacylglycerols (TAG)?
because they are esters composed of three fatty acids joined to the trihydroxy alcohol, glycerol
-
General formula of saturated fatty acid?
CH3(CH2)nCOOH
|
|
