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
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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3.
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Homologous chromosomes are pairs of chromosomes containing genes that code
for a. | different
traits. | c. | DNA. | b. | the same traits. | d. | cytosol. | | | | |
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4.
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In
humans, the male determines the sex of the child because males have a. | two X
chromosomes. | c. | two Y
chromosomes. | b. | one X and one Y chromosome. | d. | 46 chromosomes. | | | | |
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5.
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The
diploid number of chromosomes in a human skin cell is 46. The number of chromosomes found in a human
ovum is
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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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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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8.
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People with Down syndrome have a. | 45 chromosomes. | c. | 47 chromosomes. | b. | 46
chromosomes. | d. | no X
chromosomes. | | | | |
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9.
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Which
of the following shows the correct sequence of the cell cycle? a. | C ® M ® G1
® S ®
G2 | c. | G1
® S ® G2
® M ®
C | b. | S ® G1
® G2
® M ®
C | d. | None of the
above | | | | |
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10.
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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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11.
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cell
growth : G1 :: a. | mitosis : C | c. | mitochondria replication : S | b. | mitosis :
meiosis | d. | DNA copying :
S | | | | |
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12.
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metaphase : prophase :: a. | G1 : M | c. | M : C | b. | G2 :
S | d. | autotroph :
producer | | | | |
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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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The
cell cycle is monitored as each cell passes through a. | cellular
respiration. | c. | photosynthesis. | b. | checkpoints. | d. | homeostasis. | | | | |
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15.
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In
eukaryotes, the cell cycle is controlled by a. | proteins. | c. | lipids. | b. | carbohydrates. | d. | fats. | | | | |
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16.
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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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17.
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A
spindle fiber is a specialized form of a. | microtubule. | c. | cilium. | b. | flagellum. | d. | chromosome. | | | | |
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18.
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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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19.
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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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20.
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Refer
to the illustration above. During which stage do the centromeres divide?
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