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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Plants use energy from the sun to produce carbon dioxide and sugars.
_________________________
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2.
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A
heterotroph is an organism that cannot make its own food.
_________________________
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3.
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Photosynthesis and respiration form a cycle that keeps the levels of water and
carbon dioxide fairly constant in the atmosphere. _________________________
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4.
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The
raw materials for respiration are the opposite of the end products for photosynthesis.
_________________________
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5.
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When
muscle cells run low on oxygen, lactic acid fermentation takes place.
_________________________
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6.
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A
cell makes a copy of its DNA during the stage of the cell cycle called mitosis.
_________________________
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7.
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In a
DNA molecule, guanine always pairs with thymine. _________________________
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8.
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Cancerous cells grow in an abnormal way.
_________________________
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9.
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A
mutation is a mass of abnormal cells that develops when cancerous cells divide and grow
uncontrollably. _________________________
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10.
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Radiation is more harmful to normal cells than to cancerous cells.
_________________________
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Essay
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11.
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Briefly explain what happens in each of the two stages of
photosynthesis.
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12.
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Briefly explain what happens in each of the two stages of respiration. State the end
products and where the stages occur in the cell.
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13.
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Explain the following statement: Plant cells and animal cells recycle each
other’s waste products.
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14.
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Animals do not make their own food from energy in sunlight. Explain why they still
depend on the sun for energy.
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15.
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Explain what a cell would look like if it went through all stages of the cell cycle
except cytokinesis.
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16.
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Define DNA replication and explain its function.
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17.
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A
person visits a hospital because of a sore arm. Tests show that cancer is present in the arm bone,
but that the cancer began in the stomach. Explain why the cancer is called stomach cancer and not
bone cancer.
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18.
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Suppose one side of a piece of DNA contains the following series of nitrogen bases:
A-C-G-C-T-T. What is the series of nitrogen bases on the other side of that piece of DNA? Explain how
you arrived at your answer.
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