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Chapter 24


MULTIPLE CHOICE.  Choose the one alternative that best completes the statement 
or answers the question.

1)  The term metabolism is best defined as: 
    A)  the length of time it takes to digest and absorb fats. 
    B)  a measure of carbohydrate utilization. 
    C)  the number of calories it takes to keep from shivering on a cold day. 
    D)  the sum of energy produced by all the chemical reactions and 
        mechanical work of the body. 

2)  Gluconeogenesis is the process in which: 
    A)  glycogen is broken down to release glucose. 
    B)  glucose is formed from noncarbohydrate precursors. 
    C)  glycogen is formed. 
    D)  glucose is converted into carbon dioxide and water. 

3)  Which of the following does not occur in the mitochondria? 
    A)  electron transport 
    B)  glycolysis 
    C)  Krebs cycle 
    D)  formation of malic acid from fumaric acid 

4)  During normal conditions, proteins are essential to the body for all of 
    the following except: 
    A)  production of energy. 
    B)  production of some hormones. 
    C)  production of enzymes, clotting factors, and antibodies. 
    D)  formation of functional molecules like hemoglobin and cytochromes. 

5)  Oxidation-reduction reactions are catalyzed by which of the following 
    enzymes? 
    A)  dehydrogenases and oxidases 
    B)  kinases and phosphorylases 
    C)  phosphatases and kinases 
    D)  synthetases and lipases