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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Binary fission a. | occurs when two cells collide with each
other. | b. | produces excess energy. | c. | creates new
species. | d. | is the process by which bacteria
reproduce. | | |
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2.
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The
point at which two chromatids are attached to each other in a chromosome is called
a(n) a. | chloroplast. | c. | gamete. | b. | centromere. | d. | centriole. | | | | |
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3.
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Normal human males develop from fertilized eggs containing which of the following sex
chromosome combinations?
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4.
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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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5.
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In
humans, gametes contain a. | 22 autosomes and 1 sex chromosome. | b. | 1 autosome and
22 sex chromosomes. | c. | 45 autosomes and 1 sex chromosome. | d. | 1 autosome and
45 sex chromosomes. | | |
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6.
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The X
and Y chromosomes are called the a. | extra chromosomes. | c. | sex chromosomes. | b. | phenotypes. | d. | All of the
above | | | | |
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7.
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If
nondisjunction occurs, a. | there will be too many gametes
produced. | b. | no gametes will be produced. | c. | a gamete will
receive too many or too few homologues of a chromosome. | d. | mitosis cannot
take place. | | |
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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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A
student can study a karyotype to learn about the a. | cell cycle. | b. | genes that are
present in a particular strand of DNA. | c. | medical history of an individual. | d. | number and
structure of the chromosomes in a somatic cell. | | |
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10.
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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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11.
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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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12.
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A
spindle fiber is a specialized form of a. | microtubule. | c. | cilium. | b. | flagellum. | d. | chromosome. | | | | |
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13.
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The
phase of mitosis that is characterized by the arrangement of all chromosomes along the equator of the
cell is called a. | telophase. | c. | anaphase. | b. | metaphase. | d. | prophase. | | | | |
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14.
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As a
result of mitosis, each of the two new cells produced from the parent cell during
cytokinesis a. | receives a few
chromosomes from the parent cell. | b. | receives an exact copy of all the chromosomes present in the
parent cell. | c. | donates a chromosome to the parent
cell. | d. | receives exactly half the chromosomes from the parent
cell. | | |
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15.
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Refer
to the illustration above. The cell in diagram 1 is in a. | metaphase. | c. | anaphase. | b. | telophase. | d. | prophase. | | | | |
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16.
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Refer
to the illustration above. Mitosis begins with the stage shown in diagram
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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. During which stage do the centromeres divide?
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19.
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In
plant cells, cytokinesis occurs a. | immediately after the chromosomes make exact copies of
themselves. | b. | immediately after the spindle fibers are
formed. | c. | as mitosis ends. | d. | when osmotic
pressure is too low. | | |
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20.
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Which
of the following statements is true? a. | Prokaryotes divide by mitosis. | b. | Eukaryotes have
circular chromosomes. | c. | Animal cells form new cell walls when they
divide. | d. | Plant cells and animal cells have different strategies for
cytokinesis. | | |
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