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Homework answers / question archive / University of Central Florida FIL 1000 Ch 8 Quiz 1)Biological waxes are composed of Select one: a

University of Central Florida FIL 1000 Ch 8 Quiz 1)Biological waxes are composed of Select one: a

Chemistry

University of Central Florida

FIL 1000

Ch 8 Quiz

1)Biological waxes are composed of Select one:

a.            glycerol and only one fatty acid.

b.            glycerol and two fatty acids

c.             a fatty acid and a long-chain alcohol.

d.            cholesterol and a fatty acid.

 

2.            Cell membranes typically display asymmetry. What does this mean? Select one:

a.            The two leaves of a bilayer contain different collections of lipids and proteins.

b.            The fatty acyl chain on C-1 of a membrane lipid is usually different from that on C-3.

c.             Only one stereoisomer is ever seen at the chiral C-2 of the glycerol residue in a membrane lipid.

d.            Membrane lipids only have cis double bonds, never trans.

 

3.            Fatty acids with multiple double bonds are usually conjugated.

 

Select one:

a.            True b. False

 

4.            Glycolipids are characterized by containing the following non-lipid component: Select one:

a.            Sugars

b.            Glycerol

c.             Phosphate

d.            Sphingosine

e.            More than one of these characterize glycolipids.

 

5.            How does cholesterol affect membrane fluidity? Select one:

a.            It tends to increase the fluidity. b. It tends to decrease the fluidity.

c. It doesn't have any specific effect on fluidity.

d. membranes don't have cholesterol

 

6.            Liposomes are Select one:

a.            artificial membrane-bounded structures used to deliver medications.

b.            single-layered membranes.

c.             mixed micelles involved in cholesterol transport among cells.

d.            bilayers with the hydrophobic regions on the outside.

 

 

 

 

7.            Passive transport is the same as:

Select one:

a.            simple diffusion

b.            facilitated diffusion

c.             active transport

d.            primary active transport

8.            Saponification is the hydrolysis of a

 

Select one:

a.            peptide bond b. ester bond

c. anhydride bond

d. glycosidic bond

 

9.            Sphingolipids are particularly important in these structures: Select one:

 

a.            Membranes

b.            Lipoproteins

c.             The brain and nervous system.

d.            Membranes, the brain and the nervous system.

e.            All of these are correct.

 

10.          The HDL class of lipoprotein is generally believed to be preventative of heart disease. Select one:

a.            True

b.            False

 

 

 

 

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