Answers to Self-Quiz in the Workbook

                        SELF QUIZ

1.   Which of these is not a function of water in the body?

         a.   acts as a solvent for important body chemicals

b.   reduces excess heat by evaporation

c.   water's high heat capacity helps moderate temperature changes

d.   keeps cells turgid by osmosis (turgid is the opposite of flaccid or limp)

e.   acts as a buffer for oxidation and reduction reactions

2.   CH₃CH₂CH₂CH₂CH₂CO₂H is: 

a.   hydrophilic

b.   hydrophobic

c.   both hydrophilic and hydrophobic

d.   neither hydrophilic or hydrophobic

3.   Choose the item which is not a lipid.

         a.   neutral fat (triester of glycerol)

b.   fatty acid

c.   fatty acid ester

d.   cholesterol and other natural high molecular weight alcohols

e.   vitamin c

4.   Which of these would be used in describing the predominant cell membrane structure?

         a.   a double layer

b.   neutral fats

c.   hydrophobic parts in the middle of the membrane layer

d.   hydrophilic parts on outside of membrane (toward the interstitial fluid or toward the cell interior)

e.   all of the above would be used

5.   The production of ATP by intermolecular dehydration of ADP and a hydrogen phosphate is:

         a.   associated with the cellular process for breakdown and oxidation of the fats

b.   a process that stores energy for other cellular reactions

c.   endothermic

d.   all of the above

e.   none of the above

6.   Lipids fall into these categories - fats, fatty acids and others.  Which of these does not fit in the "others" category?

         a.   terpene

b.   steroid

c.   wax

d.   butyric acid (very short chain, not a "fatty acid")

7.   Which of these would be least hydrophilic?

         a.   fatty acid

b.   sterol (no polar functional groups at all)

c.   fat

d.   all would be equally hydrophilic

8.   What kind of compound is CH₃(CH₂)₆ COOH       

         a.   cholesterol

b.   oil

c.   fat

d.   fatty acid

e.   terpene

9.              This compound is a(n):  (see workbook for structure)           

        a.   cholesterol                     

b.   oil                 

c.   fat (completely saturated triester)                          

         d.   fatty acid                   

e.   terpene              

10.  To be classed as a lipid, a compound is usually:

         a.   a fat

b.   a terpene

c.   a steroid

d.   hydrophilic

e.   not very soluble in water (hydrophobic)

HB/EFrev/9/8/04

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