Multiple Choice
Identify the choice that best completes the
statement or answers the question.
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1.
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Mitosis is the stage of the cell cycle 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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2.
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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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3.
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During what stage of the cell cycle does replication occur?
a. | interphase | b. | cytokinesis | c. | prophase | d. | mitosis |
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4.
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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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5.
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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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6.
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The stage of the cell cycle that follows mitosis is called
a. | interphase. | b. | metaphase. | c. | cytokinesis. | d. | telophase. |
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7.
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The regular cycle of growth and division that cells undergo is called
a. | replication. | b. | the cell cycle. | c. | interphase. | d. | mitosis. |
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8.
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A DNA molecule 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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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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11.
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What is the chromosome theory of inheritance?
a. | Chromosomes are carried from parents to offspring on hybrids. | b. | Genes are carried
from parents to offspring on chromosomes. | c. | Hybrid pairs of chromosomes combine to form
offspring. | d. | Codominant genes combine to form new hybrids. |
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12.
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Walter Sutton discovered that the sex cells of grasshoppers have
a. | 12 times the number of chromosomes found in the body cells. | b. | twice the number of
chromosomes found in the body cells. | c. | the same number of chromosomes found in the
body cells. | d. | half the number of chromosomes found in the body
cells. |
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13.
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When sex cells combine to produce offspring, each sex cell will
contribute
a. | one fourth the number of chromosomes in body cells. | b. | half the number of
chromosomes in body cells. | c. | the normal number of chromosomes in body
cells. | d. | twice the number of chromosomes in body cells. |
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14.
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Chromosomes are made up of
a. | one pair of alleles. | b. | many traits joined
together. | c. | transfer RNA. | d. | many genes joined
together. |
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15.
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What determines the genetic code?
a. | the order of nitrogen bases,(adenine, thymine, cytosine, and guanine,)along a
gene | b. | the number of nitrogen bases in a DNA molecule | c. | the order of amino
acids in a protein | d. | the number of guanine and cytosine bases in a
chromosome |
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