Self Quiz Answers

Here are the answers to the 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 (-CO₂H) and hydrophobic (CH₃CH₂CH₂CH₂CH₂-)
d. neither hydrophilic or hydrophobic

3. What is the role of chemicals like NAD⁺ and FAD in the metabolism of fats?

a. they are catalysts for hydrolysis
b. they are decarboxylating agents
c. they catalyze the isomerization of citric acid into isocitric acid
*d. they are oxidizing agents in the electron transport system
e. they are substrates for coenzyme A in the fatty acid spiral

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

a. a double layer
b. neutral fats and/or phospholipids
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

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

a. cholesterol
b. oil
c. fat
*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

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E-mail instructor: Sue Eggling

Clackamas Community College
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