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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Organisms, such as plants, that make their own food are called a. | autotrophs. | b. | heterotrophs. | c. | thylakoids. | d. | pigments. | | |
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2.
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Organisms that cannot make their own food and must obtain energy from the foods they
eat are called a. | autotrophs. | b. | heterotrophs. | c. | thylakoids. | d. | plants. | | |
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3.
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Which
of the following is an autotroph? a. | mushroom | b. | dog | c. | monkey | d. | tree | | |
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4.
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What
are the three parts of an ATP molecule? a. | adenine, thylakoids, stroma | b. | stroma, grana, chlorophyll | c. | adenine, ribose, phosphate | d. | NADH, NADPH, and
FADH2 | | |
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5.
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Energy
is released from ATP when a. | a phosphate group is added. | b. | adenine bonds to ribose. | c. | ATP is exposed to sunlight. | d. | a phosphate group is removed. | | |
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6.
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Jan
van Helmont concluded that plants gain most of their mass from a. | water. | b. | the soil. | c. | carbon dioxide in the air. | d. | oxygen in the air. | | |
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7.
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Ingenhousz showed that plants produce oxygen bubbles when exposed to a. | ATP. | b. | carbon dioxide. | c. | light. | d. | a burning candle. | | |
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8.
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Photosynthesis uses sunlight to convert water and carbon dioxide into a. | oxygen. | b. | high-energy sugars. | c. | ATP and oxygen. | d. | oxygen and high-energy sugars. | | |
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9.
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In the
overall equation for photosynthesis, six molecules of carbon dioxide result in six molecules
of a. | glucose. | b. | water. | c. | oxygen. | d. | ATP. | | |
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10.
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Plants
gather the sun's energy with light-absorbing molecules called a. | pigments. | b. | thylakoids. | c. | chloroplasts. | d. | glucose. | | |
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11.
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Plants
take in the sun's energy by absorbing a. | high-energy sugars. | b. | chlorophyll a. | c. | chlorophyll b. | d. | sunlight. | | |
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12.
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Most
plants appear green because chlorophyll a. | does not absorb green light. | b. | reflects violet light. | c. | absorbs green light. | d. | none of these | | |
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13.
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Where
do the light-dependent reactions take place? a. | in the stroma | b. | outside the chloroplasts | c. | in the thylakoid membranes | d. | only in chlorophyll molecules | | |
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14.
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What
are the products of the light-dependent reactions? a. | oxygen gas | b. | ATP | c. | NADPH | d. | all of these | | |
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15.
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The
Calvin cycle is another name for a. | light-independent reactions. | b. | light-dependent reactions. | c. | photosynthesis. | d. | all of these | | |
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16.
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The
Calvin cycle takes place in the a. | stroma. | b. | photosystems. | c. | thylakoid membranes. | d. | chlorophyll molecules. | | |
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17.
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If
carbon dioxide is removed from a plant's environment, what would you expect to happen to its
production of high-energy sugars? a. | More sugars will be produced. | b. | Fewer sugars will be produced. | c. | The same number of sugars will be produced but without
carbon dioxide. | d. | Carbon dioxide does not affect the production of
high-energy sugars in plants. | | |
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18.
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Which
of the following affects the rate of photosynthesis? a. | water | b. | temperature | c. | light intensity | d. | all of these | | |
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Figure
8-2
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19.
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Which
of the graphs in Figure 8-2 represents the effect of temperature on the rate of
photosynthesis?
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20.
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Which
of the graphs in Figure 8-2 represents the effect of light intensity on the rate of
photosynthesis?
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