Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Which
of the following organic compounds is the main source of energy for living things? a. | carbohydrates | c. | nucleic
acids | b. | lipids | d. | proteins | | | | |
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2.
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An
example of a Protein is ____ a. | Sugar | c. | Insulin | b. | Fats | d. | DNA | | | | |
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3.
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An
example of a Nucleic acid is ____ a. | Sugar | c. | Insulin | b. | Fats | d. | DNA | | | | |
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4.
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According to Figure 2–3, at what temperature do the two enzymes have the same
amount of activity?
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5.
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Which
statement best decribes the function of a lipid in a cell? a. | sorting and
transmiting heredity. | b. | forming part of biological membranes. | c. | forming amino
acid chains | d. | storing phophorus | | |
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6.
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A
very strong base might have a pH of _____.
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7.
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Complex macromolecules that store genetic information in cells. a. | Carbohydrates | b. | Lipids | c. | Proteins | d. | Nucleic
Acids | | | | | | | | |
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8.
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The
part of an experiment in which all conditions are kept the same is the _____. a. | hypothesis | c. | conclusion | b. | control | d. | independent variable | | | | |
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9.
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Amino
acid is to protein as a. | fatty acid is to lipid. | c. | sugar is to fat. | b. | DNA is to
RNA. | d. | simple sugar is
to starch. | | | | |
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10.
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If
the pH of stomach acid and of oven cleaner were measured, a. | both would be
below 7. | b. | both would be above 7. | c. | the pH of
stomach acid would be above 7, but the pH of oven cleaner would be below 7. | d. | the pH of
stomach acid would be below 7, but the pH of oven cleaner would be above 7. | | |
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11.
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A
substance with a pH of 6 is called a. | an acid. | c. | both an acid and a base. | b. | a
base. | d. | neither an acid
nor a base. | | | | |
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12.
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An
example of a Carbohydrate is ____ a. | Sugar | c. | Insulin | b. | Fats | d. | DNA | | | | |
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13.
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Which of the following statements about enzymes is true? a. | Enzymes work
faster the higher the temperature. | b. | Enzymes can be turned off by a change in the pH of a
cell. | c. | Enzymes speed up or slow down chemical reactions in the cell as
needed. | d. | Enzymes can only bind with one substrate before becoming
inactive. | | |
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14.
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Which
of the following is NOT a function of proteins? a. | store and transmit heredity | b. | help to fight
disease | c. | control the rate of reactions and regulate cell
processes | d. | build tissues such as bone and muscle | | |
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15.
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What
is primarily responsible for the surface tension of water? a. | dispersion
forces | c. | ionic
attractions | b. | hydrogen bonding | d. | covalent bonding | | | | |
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16.
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The
various enzymes in our bodies are _____. a. | lipids | c. | nucleotides | b. | carbohydrates | d. | proteins | | | | |
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17.
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Which
is responsible for the high thermal energy required to melt ice? a. | covalent
bonding | c. | hydrogen
bonding | b. | dispersion forces | d. | ionic attractions | | | | |
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18.
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An
example of a lipid is ____ a. | Sugar | b. | Fats | c. | Insulin | d. | DNA | | | | | | | | |
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19.
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What
test is used for lipids? a. | Brown Paper bag | c. | Biuret Test | b. | Iodine
test | d. | Benedict’s
Test | | | | |
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20.
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What
test is used for proteins? a. | Brown Paper bag | c. | Biuret Test | b. | Iodine
test | d. | Benedict’s
Test | | | | |
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