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
pairing of _____ in DNA is the key feature that allows DNA to be copied. a. | codons | c. | chromosomes | b. | nucleotides | d. | nitrogen bases | | | | |
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2.
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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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3.
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Where
in the cell of Figure 13-2 does translation occur? a. | at the
ribosomes | c. | in food
vacuoles | b. | in the nucleus | d. | within the plasma membrane | | | | |
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4.
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A DNA
nucleotide may be made up of a phosphate group, along with _____. a. | deoxyribose
sugar and uracil | c. | ribose sugar and
cytosine | b. | ribose sugar and adenine | d. | deoxyribose sugar and thymine | | | | |
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Table 13-1
| Help
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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5.
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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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6.
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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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7.
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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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8.
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An
RNA molecule is a polymer composed of subunits known as _____. a. | polysaccharides | c. | uracil
molecules | b. | ribose molecules | d. | nucleotides | | | | |
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9.
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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. | nondisjunction | c. | a frameshift mutation | b. | a point
mutation | d. | crossing
over | | | | |
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10.
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Which
series is arranged in order from largest to smallest in size? a. | chromosome,
nucleus, cell, DNA, nucleotide | b. | cell, nucleus, chromosome, DNA,
nucleotide | c. | nucleotide, chromosome, cell, DNA,
nucleus | d. | cell, nucleotide, nucleus, DNA,
chromosome | | |
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11.
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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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12.
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X
rays, ultraviolet light, and radioactive substances that can change the chemical nature of DNA are
classified as _____. a. | mutagenic agents | c. | growth regulators | b. | hydrolytic
enzymes | d. | metamorphic
molecules | | | | |
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13.
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The
process by which a DNA molecule is copied is called _____. a. | replication | c. | mitosis | b. | binary fission | d. | translation | | | | |
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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. | monoploidy | c. | polyploidy | b. | monosomy | d. | trisomy | | | | |
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15.
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_____
is usually lethal because a _____ of genetic material is lost. a. | Triploidy, small
amount | c. | Triploidy, great
amount | b. | Monosomy, greater amount | d. | Monosomy, small amount | | | | |
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