Modified
True/False
Bubble in "A" for true and "B" for false.
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1.
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Water helps keep the
temperature of cells from changing rapidly.
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2.
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An organic compound
contains carbon.
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3.
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In passive transport,
materials move from a higher to a lower concentration through a cell membrane.
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4.
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Plants use energy from the sun
to produce carbon dioxide and sugars.
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5.
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A heterotroph is an
organism that cannot make its own food.
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6.
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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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7.
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Photosynthesis and respiration
are two processes which are the opposites of each other.
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8.
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When muscle cells run low on
oxygen, lactic-acid fermentation takes place.
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9.
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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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10.
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In a DNA molecule, guanine
always pairs with thymine.
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Multiple
Choice
Identify the letter of the choice that best completes the statement or answers the
question.
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11.
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All organic compounds contain
the element a. | water. | b. | oxygen. | c. | carbon. | d. | nitrogen. | | |
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12.
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Which term refers to proteins
that speed up chemical reactions in living things? a. | carbohydrate | b. | enzyme | c. | amino acid | d. | nucleic acid | | |
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13.
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DNA and RNA
are a. | lipids. | b. | enzymes. | c. | amino acids. | d. | nucleic acids. | | |
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14.
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Why is water important for a
cell? a. | Water is the main ingredient in DNA. | b. | All proteins require water to function. | c. | Most chemical reactions in cells require water. | d. | Water is an essential organic compound for the body. | | |
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15.
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The water in a
cell a. | allows the temperature of the cell to change rapidly. | b. | keeps substances from moving in and out of cells. | c. | helps the cell keep its size and shape. | d. | prevents chemical reactions from taking place. | | |
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16.
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Which term refers to the
movement of molecules from an area of higher concentration to an area of lower
concentration? a. | collision | b. | diffusion | c. | active transport | d. | concentration | | |
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17.
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Which term refers to the
movement of water molecules through a selectively permeable membrane? a. | osmosis | b. | engulfing | c. | active transport | d. | passive
transport | | |
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18.
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Which term refers to the
movement of materials through a cell membrane without using energy? a. | concentration | b. | collision | c. | active transport | d. | passive
transport | | |
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19.
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Which term refers to the
movement of materials through a cell membrane when energy is required? a. | osmosis | b. | diffusion | c. | active transport | d. | passive
transport | | |
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20.
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One reason that cells are small
is because they a. | lack food. | b. | contain water. | c. | use energy. | d. | must remove
wastes. | | |
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21.
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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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22.
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What captures energy from
sunlight during photosynthesis? a. | solar cells | b. | stomata | c. | chlorophyll | d. | carbohydrates | | |
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23.
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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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24.
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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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25.
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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 water. | | |
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26.
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What happens during
respiration? a. | Oxygen is released into the air. | b. | Glucose is broken down, releasing energy. | c. | Carbohydrates are released into the bloodstream. | d. | Water and carbon dioxide are converted into energy. | | |
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27.
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The stage of respiration that
releases most of the energy in glucose occurs in the a. | nucleus. | b. | chloroplast. | c. | cytoplasm. | d. | mitochondria. | | |
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28.
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Respiration in most cells
requires a. | water. | b. | oxygen. | c. | chlorophyll. | d. | carbon dioxide. | | |
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29.
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How are photosynthesis and
respiration related? a. | They have opposite
equations. | b. | They have the same equation. | c. | They both produce carbon dioxide. | d. | They both produce oxygen. | | |
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30.
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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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31.
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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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32.
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Which of these choices causes a
form of alcoholic fermentation? a. | carbon dioxide | b. | lactic acid | c. | bread | d. | yeast | | |
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33.
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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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34.
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Mitosis is the stage during
which a. | the cell's nucleus divides into two new nuclei. | b. | the cell's DNA is replicated. | c. | the cell divides into two new cells. | d. | the cell's cytoplasm divides. | | |
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35.
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What are
chromatids? a. | identical strands of chromosomes | b. | identical daughter cells | c. | doubled rods of condensed
chromatin. | d. | pigments that absorb the energy in sunlight | | |
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36.
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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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37.
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What happens during cytokinesis
in animal cells? a. | A new round of mitosis begins. | b. | Two new daughter cells are formed. | c. | Each organelle divides into two parts. | d. | A cell plate forms in the middle of the cell. | | |
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38.
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Each rung of the DNA ladder is
made of a. | a single nitrogen base. | b. | a pair of nitrogen bases. | c. | three nitrogen
bases. | d. | four nitrogen bases. | | |
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39.
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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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40.
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What did the pantyhose
represent in the cells and pantyhose lab? a. | nucleus | c. | cell membrane | b. | cytoplasm | d. | nuclear membrane | | | | |
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