Modified True/False
Indicate
whether the sentence or statement is true or false. If false, change the identified word or
phrase to make the sentence or statement true.
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1.
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A
microscope is an instrument that makes distant objects look larger.
_________________________
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2.
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A
microscope that enlarges an object 400 times is said to have a resolution of 400.
_________________________
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3.
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The
outer boundary of a cell is the cell membrane. _________________________
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4.
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Organelles that use energy from sunlight to produce food are called
mitochondria. _________________________
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5.
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Plant
and animal cells usually are larger than bacterial cells.
_________________________
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6.
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The
cells in a many-celled organism often have different sizes and shapes.
_________________________
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7.
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Water
helps keep the temperature of cells from changing rapidly.
_________________________
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8.
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An
organic compound always contains carbon. _________________________
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9.
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In
passive transport, materials move from a higher to a lower concentration through a cell
membrane. _________________________
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10.
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The
cell theory states that cells are produced from nonliving cells.
_________________________
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Essay
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11.
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How
did the invention of the electron microscope help scientists learn more about the internal structures
of cells?
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12.
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Describe the functions of the nuclear membrane, chromatin, and
nucleolus.
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13.
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You
are looking at the inside of a cell. Explain how you can tell whether the cell is animal, bacterial,
or plant.
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14.
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State
the function of each of the following: DNA, enzyme, fat, sugar. Classify each of them into the group
of organic compounds to which they belong.
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15.
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Raising the temperature of a substance causes its molecules to move faster. Explain
why raising the temperature of a liquid would speed up diffusion.
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16.
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Describe the two methods of active transport.
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17.
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Use
the three points of the cell theory to explain how humans and bacteria are similar.
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18.
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Contrast mitochondria and chloroplasts.
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