Bio 6A/C - DNA Components and Changes/Mutations (Part I - Ch. 6 HOLT Biology)
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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The
chromosome of a bacterium a. | is wrapped around proteins. | b. | has a circular
shape. | c. | occurs in multiple pairs within the
cell. | d. | is found within the nucleus. | | |
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2.
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In a
bacterium, cell division takes place when a. | its nucleus divides. | b. | the cell splits
into two cells, one of which receives all of the DNA. | c. | the DNA is
copied, a new cell wall forms between the DNA copies, and the cell splits into two
cells. | d. | None of the above | | |
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3.
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In
order to fit within a cell, DNA becomes more compact by a. | breaking apart
into separate genes. | b. | extending to form very long, thin
molecules. | c. | wrapping tightly around associated
proteins. | d. | being enzymatically changed into a
protein. | | |
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4.
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When
a molecule of DNA is being used to direct a cell’s activities, a. | areas containing
specific active genes are extended. | b. | the areas of the molecule containing active genes become
shorter. | c. | the entire DNA molecule becomes tightly
coiled. | d. | the molecule becomes a rod-shaped structure with two
chromatids. | | |
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5.
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female : XX :: a. | female : gametes | c. | male : YY | b. | female :
eggs | d. | male :
XY | | | | |
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6.
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diploid : somatic cell :: haploid : a. | body
cell | c. | gamete | b. | chromosome | d. | zygote | | | | |
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7.
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A
diploid cell is one that a. | has two homologues of each
chromosome. | b. | is designated by the symbol
2n. | c. | has chromosomes found in pairs. | d. | All of the
above | | |
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8.
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Trisomy is a mutation that results in a cell having an extra a. | nitrogen
base. | c. | chromosome. | b. | codon. | d. | gene. | | | | |
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9.
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Cells
that are not dividing remain in the a. | mitosis phase. | c. | first growth phase. | b. | synthesis
phase. | d. | cytokinesis
phase. | | | | |
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10.
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The
synthesis (S) phase is characterized by a. | DNA replication. | b. | cell
division. | c. | replication of mitochondria and other
organelles. | d. | the division of cytoplasm. | | |
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11.
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Mitosis is the process by which a. | microtubules are assembled. | b. | cytoplasm is
divided. | c. | the nucleus is divided into two
nuclei. | d. | the cell rests. | | |
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12.
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The
first three phases of the cell cycle are collectively known as a. | cellular
respiration. | c. | mitosis. | b. | telophase. | d. | interphase. | | | | |
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13.
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At
the DNA synthesis (G2) checkpoint, DNA replication is checked by a. | receptor
proteins. | c. | repair
enzymes. | b. | electron transport chains. | d. | cell surface markers. | | | | |
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14.
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In
eukaryotes, the cell cycle is controlled by a. | proteins. | c. | lipids. | b. | carbohydrates. | d. | fats. | | | | |
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15.
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Normal cells become cancer cells when a. | regulation of
cell growth and division is lost. | b. | cells do not respond normally to control
mechanisms. | c. | cells continue to divide without passing through
G1. | d. | All of the
above | | |
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16.
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A
spindle fiber is a specialized form of a. | microtubule. | c. | cilium. | b. | flagellum. | d. | chromosome. | | | | |
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17.
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Mitosis is a process by which a. | DNA is replicated. | c. | cells grow in size. | b. | cytokinesis
occurs. | d. | a cell’s
nucleus divides. | | | | |
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18.
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Refer
to the illustration above. Which of the following correctly indicates the order in which these events
occur? a. | A, B, C,
D | c. | B, A, C,
D | b. | C, B, A,
D | d. | A, C, B,
D | | | | |
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19.
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5
steps: the cell cycle :: a. | 6 steps : prophase | c. | 3 steps : meiosis | b. | 9 steps :
cytokinesis | d. | 4 steps :
mitosis | | | | |
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20.
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Cytokinesis in plant cells involves the formation of a. | replicated
chromosomes. | c. | spindle
fibers. | b. | a cell plate. | d. | centrioles. | | | | |
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