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Multiple Choice
Identify the choice that best completes the statement or answers the question.
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1.
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All organic compounds contain the element
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a.
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C. |
c.
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Ca. |
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b.
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N. |
d.
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Na. |
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2.
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Carbon is different from many other elements in that
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a.
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it has four electrons in its outermost energy level. |
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b.
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it readily bonds with other carbon atoms. |
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c.
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it can form single, double, or triple bonds with other atoms. |
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d.
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All of the above |
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3.
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Which of the following is not true of alcohols?
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a.
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They contain a hydroxyl group (–OH). |
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b.
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They are polar molecules. |
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c.
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They can affect processes in living things, either positively or negatively. |
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d.
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They are the only kind of functional group in organic molecules that contains oxygen. |
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4.
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The formation of ADP and inorganic phosphate from ATP and water is an example of which kind of reaction?
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a.
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condensation |
c.
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hydrolysis |
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b.
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polymerization |
d.
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oxidation |
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5.
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Which of the following is a carbohydrate?
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a.
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DNA |
c.
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wax |
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b.
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insulin |
d.
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sucrose |
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6.
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Which organic molecule below is classified as a carbohydrate?
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a.
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amino acid |
c.
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nucleotide |
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b.
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CH2 chain |
d.
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sugar |
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7.
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Animals store glucose in the form of
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a.
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cellulose. |
c.
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wax. |
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b.
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glycogen. |
d.
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lipids. |
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8.
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Polysaccharides are
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a.
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carbohydrates. |
c.
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proteins. |
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b.
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lipids. |
d.
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unsaturated fats. |
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9.
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All of the following are examples of carbohydrates except
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a.
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sugar. |
c.
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steroids. |
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b.
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cellulose. |
d.
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glycogen. |
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10.
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Amino acids are monomers of
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a.
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disaccharides. |
c.
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nucleotides. |
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b.
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proteins. |
d.
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steroids. |
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11.
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Which organic molecule below is most closely related to proteins?
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a.
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amino acids |
c.
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nucleotides |
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b.
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CH2 chains |
d.
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sugars |
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12.
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Long chains of amino acids are found in
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a.
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carbohydrates. |
c.
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proteins. |
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b.
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lipids. |
d.
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sugars. |
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13.
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Refer to the illustration above. Molecules like molecule 2 are found in
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a.
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carbohydrates. |
c.
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nucleic acids. |
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b.
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lipids. |
d.
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proteins. |
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14.
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Lipids are
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a.
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polar molecules. |
c.
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protein molecules. |
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b.
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similar to water molecules. |
d.
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nonpolar molecules. |
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15.
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All of the following are examples of lipids except
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a.
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saturated fats. |
c.
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cholesterol. |
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b.
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starch. |
d.
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earwax. |
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16.
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Saturated fatty acids contain
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a.
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carbon atoms that are each bonded to four other atoms. |
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b.
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carbon atoms linked by double bonds. |
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c.
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no carboxyl (–COOH) groups. |
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d.
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more than 100 carbon atoms. |
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17.
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Lipids are soluble in
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a.
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water. |
c.
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oil. |
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b.
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salt water. |
d.
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All of the above |
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18.
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Which organic molecule below is most closely related to lipids?
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a.
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amino acids |
c.
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nucleotides |
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b.
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CH2 chains |
d.
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sugars |
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19.
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Which organic molecule below is most closely related to nucleic acids?
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a.
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amino acids |
c.
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nucleotides |
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b.
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CH2 chains |
d.
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sugars |
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20.
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Nucleic acids include
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a.
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chlorophyll and retinal. |
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b.
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DNA and RNA. |
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c.
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lipids and sugars. |
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d.
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glucose and glycogen. |
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21.
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Energy is released when the bond between
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a.
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carbon atoms in ATP is broken. |
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b.
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ribose and adenine in ATP is broken. |
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c.
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phosphate groups in ATP is broken. |
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d.
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two ATP molecules is broken. |
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22.
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A model of enzyme action is the
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a.
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induced fit model. |
c.
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activator action model. |
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b.
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lipid bilayer model. |
d.
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active site model. |
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23.
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All of the following are functional groups except
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a.
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a hydroxyl group. |
c.
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a carboxyl group. |
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b.
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an amino group. |
d.
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a carbonate group. |
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24.
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A phospholipid molecule contains all of the following except
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a.
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two fatty acids. |
c.
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a phosphate group. |
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b.
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three fatty acids. |
d.
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glycerol. |
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25.
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Without enzymes, the chemical reactions in the body would
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a.
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happen too fast. |
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b.
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occur at much the same rate as they do with enzymes. |
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c.
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require a different pH. |
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d.
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occur too slowly to support life processes. |
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26.
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Carbon atoms can bond together to form all of the following except
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a.
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ring structures. |
c.
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straight chain structures. |
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b.
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inorganic structures. |
d.
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branched structures. |
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27.
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Amino acid is to protein as
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a.
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fat is to lipid. |
c.
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sugar is to fat. |
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b.
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DNA is to RNA. |
d.
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simple sugar is to starch. |
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28.
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A monosaccharide is a
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a.
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carbohydrate. |
c.
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nucleic acid. |
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b.
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lipid. |
d.
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protein. |
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29.
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Which of the following organic compounds is the main source of energy for living things?
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a.
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carbohydrates |
c.
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nucleic acids |
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b.
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lipids |
d.
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proteins |
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30.
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Which of the following is NOT a function of proteins?
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a.
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store and transmit heredity |
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b.
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help to fight disease |
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c.
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control the rate of reactions and regulate cell processes |
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d.
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build tissues such as bone and muscle |
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31.
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Which statement is true?
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a.
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Simple sugars are made of polysaccharides. |
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b.
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Glycerol is made of fatty acids. |
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c.
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RNA molecules are made of nucleotides. |
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d.
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Amino acids are made of proteins. |
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32.
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Which of the following statements about enzymes is NOT true?
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a.
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Enzymes work best at a specified pH. |
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b.
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All enzymes work inside cells. |
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c.
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Enzymes are proteins. |
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d.
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Enzymes are organic catalysts. |
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Problem
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33.
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You are given four test tubes containing purified biological macromolecules. The test tubes are unlabeled except for a number between 1 and 4. You are told that one test tube contains a protein, one contains a lipid, one contains a carbohydrate, and one contains a nucleic acid. You then perform some tests on the macromolecules and collect the following information:
1) Test tubes #2 and #4 contain nitrogen, but the other tubes do not.
2) The contents of test tube #3 are not soluble in water, but the contents of the other test tubes are soluble in water.
3) The contents of test tube #1 can be broken down into subunits that are all exactly identical to each other.
4) The macromolecule in test tube #2 is found to have a globular shape.
What are the identities of the macromolecules present in the four test tubes? Write your answer in the space below.
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