biochem 2X

19 how do the unsaturated fatty acids of complex lipids contribute to the fluidity of a membrane

the presence of cis double bondsin fatty acids produces greater fluidity cause they cannot pack together as closely as saturated fatty acids

9 which has the higer MP a. triglyceride containing only lauric acid and glyceryol b. triglyceride containing only stearic acid and glycerol

b. because its molecular weight is higher

29 where can pur cholesterol cyrstals be found in body

cholesterol crystals may be found in gallstones (sometimes pure cholestol) and joints of people suffering from bursitis

17 what are the main types f complex lipids, and what are the main characteristics of their structures

complex lipids can be classified into 2 groups: phospholipids & glycolipids. phospholipids have alcohol, 2 fatty acids, and phosphate group. glycerolipds are complex lipids that contain carbohydrates

25 name all groups of complex lipids that contain ceramides

complex lipids that contain ceramides include sphingomyelin, sphinogolipids, and cerbrosode glycolipids

27 enumerate the functional groups that contribute to the hydrophilic characteristics of glucocerebroside and sphinogmylein

hydrophilic functional groups of a. glucocerebrosie: carbohydrate, hydroxyl, amide groups b. sphiogmyelinL phosphate group, choline, hydroxyl, amide of ceramide

21 whats the difference between integral and peripheral membrane protein`

integral membranees proteins are embedded in the membrane. peripheral membrane proteins are found on membrane surfaces

3 proteins, nucleic acids, and carbohydrates are grouped by common structural features? whats the basis for grouping substances as lipids

lipids are all characterized by being insoluble in polar solvents but soluble in non-polar solvents

11 predict the order of MP of triglycerides containing fatty acids a. palmitic, palmitic stearic b. oleic, stearic, palmitic c. oleic, linoleic, oleic

lowest (c), then (b), highest (a)

5 oleic acid has a melting point of 16 C. if you converted the cis double bond into trans double bond , what would happen to the MP

melting point would increase. trans double bonds would fit more in packing of the long hydrophobic trails, creating more order and therefore more interaction between chains. this would require more energy to disrupt , and hence melting point

13 rank of increasing solubility in water a. trycleride b. diglyceride c. monoglyceriddee

more long-chain groups, lower solubility; lowest (a), then (b), highest (c)