True/False
Indicate whether the sentence or statement is true
or false.
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1.
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Gram-negative bacteria have a thick layer of peptidoglycan that stains
purple.
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2.
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Bacteria lack nuclei and therefore also lack genetic material.
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3.
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Bacterial cells have membrane-bound organelles and chromosomes.
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4.
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Bacterial cells are usually much larger than eukaryotic cells.
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5.
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Bacteria are incapable of movement themselves; they can only get to new locations by
growing toward them or by forming endospores and being carried in air or water.
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6.
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Some
bacteria cannot survive in the presence of oxygen.
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7.
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When
bacteria undergo nonreproductive genetic recombination, their bacterial chromosome is
altered.
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8.
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Certain antibiotics have become ineffective against certain strains of bacteria. These
bacteria have developed a resistance, which may be passed on from one generation of bacteria to the
next.
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9.
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The
photoautotrophic bacteria are the only bacteria that are indirectly beneficial to
humans.
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Completion
Complete each sentence or
statement.
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10.
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Spiral bacteria are called ____________________.
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11.
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Spherical bacteria are called ____________________.
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12.
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Rod-shaped bacteria are called ____________________.
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13.
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The
procedure used to distinguish between two types of bacterial cell wall structures is called
____________________.
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14.
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Protective structures that some bacteria may form under harsh conditions are
____________________.
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15.
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The
cell walls of Gram-negative eubacteria are composed of a combination of polysaccharide and
polypeptide called ____________________.
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16.
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Bacteria that obtain their energy by removing electrons from inorganic molecules,
rather than obtaining energy from the sun, are called ____________________ bacteria.
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17.
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In
general, organisms that obtain their energy from sunlight are called
____________________.
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18.
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Bacteria that are heterotrophic and feed on dead organic matter are called
____________________.
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19.
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A(n)
____________________ is a substance that can be obtained from bacteria or fungi and can be used as a
drug to fight pathogenic bacteria.
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20.
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Many
bacteria are ____________________ and play an important role in recycling carbon, nitrogen, and other
elements, while other bacteria are ____________________ and assemble organic compounds from carbon
dioxide, nitrogen, and other elements.
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