Module 8 Flashcards
(29 cards)
a group of naturally occurring substances mainly identified by their insolubility in water and their
solubility in non-aqueous solvents such as chloroform, ether, hot alcohol and benzene.
Lipids
give three examples of non aqueous solvents that are lipid soluble
chloroform, ether, hot alcohol, benzene
what do the two sheets of the lipid bilayer consist of
amphiphilic phospholipids
phosphate group at one end of phospholipid is negatively charged, making it polar
hydrophilic head
The two side-by side chains of fatty acids at the other end of the phospholipid are uncharged, nonpolar
hydrophobic tail
Give 3 functions of lipids
Buoyancy, Energy Storage, Insulaton, Protection
Give 3 examples of compound lipids
Phospholipids, Glycolipids, Lipoproteins
Give examples of simple lipids
Triacyclglycerols/ triglycerides, Waxes
- Found inside living cells
- Water soluble, found in serum
they act as lipid transporters
Lipoproteins
- they are water insoluble and soluble in non-aqueous solvents
they are found in different organs but not in the plasma
Proteolipids
- Derivatives obtained via hydrolysis of simple and compound lipids.
Fatty acids, mono and diglycerides Bile acids and bile salts
Derived Lipids
give 3 examples of derived lipids
fatty acids, bile acids, bile salts
give 3 differences between saturated fatty acids and non saturated fatty acids
Saturated fatty acids = solid at room temperature, animal origin, carbon to carbon single bonds
Unsaturated fatty acids = liquid at room temperature, vegetable or plant origin, at least one carbon to carbon double bond
give 3 examples of lipids with steroid skeletons
Cholesterol, cholic acid, sodium glycocholate
give 3 examples of fatty acids
Triglycerides, Phosphoglycerides, Waxes
Reagents for Acrolein Test
Potassium Bisulfate, Ammoniacal AgNO3 solution
In an Acrolein Test an irritating/burnt fat odor with the reduction of the silver nitrate solution is indicative of what result
Positive
Reagents for the Dichromate Test
5% Potassium Dichromate, 5ml Concentrated Nitric Acid Solution
In a dichromate test if the color of the solution changes from brown to blue what is the result interpretation
Positive for glycerol
Reagents for the solubility test
10% NaOH, Cold Alcohol, Hot water, Ether
True or False? Lipids are soluble in nonpolar solvents
True, lipids are soluble in nonpolar solvents
Reagents for the Liebermann-Burchard Test
Acetic Anhydride, Sulfuric Acid, Chloroform
What test is positive for the folllowing?
Result: the solution goes from red, to blue, then bluish green
Liebermann-Burchard Test
What are the reagents for the Salkowski Test
Sulfuric Acid, Chloroform
