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 compounds may be polymers? a. | carbohydrates | c. | proteins | b. | nucleic
acids | d. | all of
these | | | | |
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2.
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Which
of the following does NOT describe a polymer? a. | Polymers are made of monomers. | b. | Polymers are
large molecules. | c. | Polymers usually form by covalent
bonding. | d. | Polymers are broken down by the process of
hydrogenation. | | |
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3.
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Carbon compounds that come from living organisms are called _____
compounds. a. | water | c. | homogeneous | b. | organic | d. | biological | | | | |
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4.
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How
many electrons can a carbon atom share?
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5.
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Which
of the following is a chemical reaction? a. | tearing paper into strips | b. | burning
paper | c. | picking up iron filings with a magnet | d. | mixing salt and
sugar in the same container | | |
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6.
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_____
represents a formula for a chemical compound.
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7.
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The
nucleus of an atom contains _____. a. | protons and neutrons | c. | protons and electrons | b. | neutrons and
electrons | d. | protons,
neutrons, and electrons | | | | |
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8.
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Electrons move about the nucleus of an atom in regions called _____. a. | electron
clouds | c. | air | b. | nuclei | d. | isotopes | | | | |
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9.
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What
are the basic building blocks of proteins? a. | nucleic acids | c. | amino acids | b. | peptide
bonds | d. | glycerol and
fatty acids | | | | |
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10.
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Water
dissolves many ionic and molecular compounds because of its _____. a. | ionic
bonding | c. | covalent
bonding | b. | polarity | d. | hydrogen bonding | | | | |
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11.
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When
molecules of glucose and fructose combine to form sucrose, they do so by _____. a. | hydrolysis | c. | condensation | b. | electron clouds | d. | radiation | | | | |
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12.
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A
chlorine atom becomes a chloride ion when it _____. a. | gains an
electron | c. | gains a
neutron | b. | loses an electron | d. | loses a proton | | | | |
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13.
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The
various enzymes in our bodies are _____. a. | lipids | c. | nucleotides | b. | carbohydrates | d. | proteins | | | | |
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14.
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Glucose and fructose, with the formula C6H12O6,
differ in _____. a. | numbers of
atoms | c. | kinds of
atoms | b. | arrangement of atoms | d. | arrangement of electrons | | | | |
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15.
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A
very strong base might have a pH of _____.
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16.
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Carbon-12, carbon-13, and carbon-14 are _____. a. | isotopes | c. | radioisotopes | b. | polymers | d. | macromolecules | | | | |
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17.
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The
total number of atoms in a molecule of sucrose, C12H22O11, is
_____.
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18.
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An
atom of fluorine has nine electrons. Its second energy level has _____. a. | two
electrons | c. | seven
electrons | b. | eight electrons | d. | nine electrons | | | | |
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19.
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An
unsaturated lipid contains _____. a. | more oxygen than hydrogen | c. | ionic bonds | b. | double
bonds | d. | only one fatty
acid | | | | |
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20.
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Unlike carbohydrates and fats, proteins contain _____. a. | nitrogen | c. | hydrogen | b. | carbon | d. | oxygen | | | | |
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21.
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Diffusion continues until there is no _____. a. | dynamic
equilibrium | c. | concentration
gradient | b. | turgor pressure | d. | homeostasis | | | | |
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22.
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Brownian motion is evidence of _____. a. | polar
ions | c. | chemical
energy | b. | random motion of molecules | d. | microorganisms | | | | |
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23.
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Which
of the atoms pictured in Figure 6-3 is most likely to form an ion?
Figure 6-3 a. | C | b. | Na | c. | O | d. | they are all equally likely to form an
ion | | |
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24.
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Which
of the images in Figure 6-4 depicts dynamic equilibrium?
Figure 6-4
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25.
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Which
element would need to be removed from the molecule in Figure 6-5 to make it
unsaturated?
Figure
6-5 a. | carbon | c. | oxygen | b. | hydrogen | d. | phosphorus | | | | |
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