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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What
are the products of photosynthesis? a. | carbon dioxide and water | b. | oxygen and
water | c. | carbon dioxide and sugars | d. | oxygen and
sugars | | |
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2.
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What
happens during photosynthesis? a. | The cell uses oxygen to make food. | b. | The cell uses
the energy in sunlight to make food. | c. | The cell uses glucose to make oxygen. | d. | The cell uses
the energy in sunlight to make carbon dioxide. | | |
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3.
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What
product of photosynthesis do most living things need to survive? a. | water | b. | oxygen | c. | chlorophyll | d. | carbon dioxide | | |
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4.
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How
does photosynthesis benefit heterotrophs? a. | It adds carbon dioxide to the air. | b. | It creates food
that they can eat. | c. | It eliminates harmful sugars. | d. | It creates clean
waters. | | |
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5.
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Respiration and photosynthesis keep the levels of carbon dioxide and oxygen in the
atmosphere a. | fairly
constant. | b. | constantly changing. | c. | constantly
increasing. | d. | constantly decreasing. | | |
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6.
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Which
term refers to the production of energy by a cell without using oxygen? a. | photosynthesis | b. | respiration | c. | fertilization | d. | fermentation | | |
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7.
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What
causes lactic-acid fermentation? a. | too little oxygen in muscle cells | b. | too much oxygen
in muscle cells | c. | too little sugar in muscle cells | d. | too much sugar
in muscle cells | | |
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8.
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DNA
is shaped like a a. | long, thin
rod. | b. | spiral
staircase. | c. | straight ladder. | d. | triple
helix. | | |
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9.
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During DNA replication, adenine (A) always pairs with a. | guanine
(G). | b. | cytosine
(C). | c. | thymine
(T). | d. | adenine
(A). | | |
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10.
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Cancer is a disease in which cells a. | grow and divide uncontrollably. | b. | die before they
can mature. | c. | stop producing DNA. | d. | die during
mitosis. | | |
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11.
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How
many different types of cancer are there? a. | 10 | b. | over 100 | c. | over
200 | d. | over
1,000 | | |
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12.
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Scientists think cancer begins when a. | a mutation
occurs in DNA. | b. | a cell divides too slowly. | c. | DNA replication
stops. | d. | cells stop growing. | | |
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13.
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What
is chemotherapy? a. | the use of drugs
to kill cancer cells | b. | the use of surgery to remove cancer
cells | c. | the use of radiation to destroy cancer
cells | d. | the use of drugs to prevent cancer from
occurring | | |
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14.
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What
is the main cause of lung cancer? a. | water pollution | b. | air
pollution | c. | an unhealthy diet | d. | smoking | | |
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15.
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What
captures energy from sunlight during photosynthesis? a. | solar
cells | b. | stomata | c. | chlorophyll and
other pigments | d. | carbohydrates | | |
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16.
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Carbon dioxide enters plants through the a. | pigments. | b. | chloroplasts. | c. | chlorophyll. | d. | stomata. | | |
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17.
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Respiration in most cells requires a. | water. | b. | oxygen. | c. | chlorophyll. | d. | carbon
dioxide. | | |
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18.
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What
is copied during replication? a. | the cell’s organelles | b. | chromosomes | c. | the cell’s DNA | d. | two daughter
cells | | |
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19.
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What
forms around the chromatids during mitosis? a. | two new chromosomes | b. | two new
nuclei | c. | two new cells | d. | two new DNA
molecules | | |
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20.
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What
factor may lead to almost as many cancer deaths as does tobacco? a. | water
pollution | b. | an unhealthy diet | c. | air
pollution | d. | exercise | | |
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Essay
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21.
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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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