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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Tangled strands of DNA wrapped around protein molecules make up the
_____. a. | microtubules | c. | spindle | b. | nuclear envelope | d. | chromatin | | | | |
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2.
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Which
of the following explains why a cell's size is limited? a. | Volume increases
faster than surface area. | b. | Surface area increases faster than
volume. | c. | Homeostasis is disrupted by a cell that is too
large. | d. | both a and c | | |
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3.
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Cells
containing two alleles for each trait are described as _____. a. | haploid | c. | diploid | b. | homozygous | d. | gametes | | | | |
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4.
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The
longest phase of the cell cycle is _____. a. | prophase | c. | metaphase | b. | interphase | d. | mitosis | | | | |
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5.
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The
numbers in Figure 12-1 represent the chromosome number found in each of the dog cells shown. The
processes that are occurring at A and B are _____. a. | meiosis and
fertilization | c. | mitosis and
fertilization | b. | mitosis and pollination | d. | meiosis and pollination | | | | |
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6.
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The
gamete that contains genes contributed only by the mother is _____. a. | the
sperm | c. | an
egg | b. | a
zygote | d. | dominant | | | | |
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7.
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A
gene is a segment of DNA that controls the production of _____. a. | carbohydrates | c. | microtubules | b. | proteins | d. | centromeres | | | | |
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8.
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Unlike plant cells, animal cells contain _____. a. | centrioles | c. | nucleoli | b. | spindles | d. | cell walls | | | | |
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9.
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Among
the following, the term that includes the others is _____. a. | cell
cycle | c. | interphase | b. | nuclear division | d. | mitosis | | | | |
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10.
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As
the size of a cell increases, _____. a. | surface area increases faster than
volume | b. | volume and surface area increase at the same
rate | c. | volume increases
faster than surface area | d. | volume increases and surface area
decreases | | |
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11.
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Which
of the following monitors a cell's progress from phase to phase during the cell
cycle? a. | protein
molecules | c. | microtubules | b. | a series of enzymes | d. | lipid molecules | | | | |
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12.
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Pollination can best be described as _____. a. | the fusing of
the egg nucleus with the pollen nucleus | b. | the transfer of the male pollen grain to the female
organ | c. | the type of cell division that produces diploid
gametes | d. | the formation of male and female sex
cells | | |
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13.
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By
the end of prophase, each of the following has occurred except _____. a. | disappearing of
the nucleolus | c. | lining up of
chromosomes in the cell | b. | tighter coiling of the
chromosomes | d. | breaking down of
the nuclear envelope | | | | |
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14.
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The
passing on of traits from parents to offspring is called _____. a. | inbreeding | c. | heredity | b. | genetics | d. | gene splicing | | | | |
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15.
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Using
Figure 12-3, which process would result in the formation of chromosome C from chromosomes A and
B? a. | segregation | c. | independent
assortment | b. | crossing over | d. | asexual reproduction | | | | |
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