Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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Table 13-1
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Wanted | Positions
Available in the genetics industry. Hundreds of entry-level openings for tireless workers. No
previous experience necessary. Must be able to transcribe code in a nuclear environment. The
ability to work in close association with ribosomes is a must. | Accuracy and Speed vital for this job in the field of translation. Applicants
must demonstrate skills in transporting and positioning amino acids. Salary commensurate with
experience. | Executive
Position available. Must be able to maintain genetic continuity through replication and control
cellular activity by regulation of enzyme production. Limited number of openings. All
benefits. | Supervisor of production of proteins--all
shifts. Must be able to follow exact directions from double-stranded template. Travel from nucleus to
the cytoplasm is additional job benefit. | |
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1.
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Applicants for the second job of the Help Wanted ad in Table 13-1, "Accuracy and
Speed," could qualify if they were _____.
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2.
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Applicants for the first job of the Help Wanted ad in Table 13-1, "Positions
Available," could qualify if they were _____.
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3.
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Applicants for the third job of the Help Wanted ad in Table 13-1, "Executive
Position," could qualify if they were _____.
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4.
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The
diagram labeled Insect A in Figure 13-3 represents the chromosomes taken from the body cell of a
normal female insect. The diagram labeled Insect B represents those taken from the body cell of a
female of the same species but with an abnormal phenotype. The chromosomal alteration seen in Insect
B could have resulted from _____. a. | a point mutation | c. | crossing over | b. | a frameshift
mutation | d. | nondisjunction | | | | |
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5.
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_____
is usually lethal because a _____ of genetic material is lost. a. | Monosomy, small
amount | c. | Triploidy, small
amount | b. | Monosomy, greater amount | d. | Triploidy, great amount | | | | |
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6.
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The
pairing of _____ in DNA is the key feature that allows DNA to be copied. a. | nucleotides | c. | nitrogen
bases | b. | codons | d. | chromosomes | | | | |
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7.
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X
rays, ultraviolet light, and radioactive substances that can change the chemical nature of DNA are
classified as _____. a. | metamorphic molecules | c. | mutagenic agents | b. | hydrolytic
enzymes | d. | growth
regulators | | | | |
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8.
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The
process by which a DNA molecule is copied is called _____. a. | translation | c. | replication | b. | binary fission | d. | mitosis | | | | |
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9.
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An
RNA molecule is a polymer composed of subunits known as _____. a. | ribose
molecules | c. | nucleotides | b. | polysaccharides | d. | uracil molecules | | | | |
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10.
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The
hereditary information for a particular trait is generally _____. a. | controlled by
alleles located on chromosomes | b. | controlled by chromosomes located on an
allele | c. | carried from the nucleus by tRNA to the
gamete | d. | coded for by a ribosome located on the
reticulum | | |
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11.
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Structure III in Figure 13-2 represents a(n) _____. a. | amino
acid | c. | gene | b. | codon | d. | DNA molecule | | | | |
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12.
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Where
in the cell of Figure 13-2 does translation occur? a. | at the
ribosomes | c. | within the
plasma membrane | b. | in food vacuoles | d. | in the nucleus | | | | |
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13.
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A DNA
nucleotide may be made up of a phosphate group, along with _____. a. | ribose sugar and
cytosine | c. | deoxyribose
sugar and thymine | b. | ribose sugar and adenine | d. | deoxyribose sugar and uracil | | | | |
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14.
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The
condition in which a zygote contains three copies of a particular chromosome as a result of
nondisjunction is called _____. a. | monosomy | c. | trisomy | b. | polyploidy | d. | monoploidy | | | | |
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15.
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Which
series is arranged in order from largest to smallest in size? a. | nucleotide,
chromosome, cell, DNA, nucleus | b. | cell, nucleotide, nucleus, DNA,
chromosome | c. | cell, nucleus, chromosome, DNA,
nucleotide | d. | chromosome, nucleus, cell, DNA,
nucleotide | | |
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