BIOB51 Verified Multiple Choice and
Conceptual Actual Exam Questions With
Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update
1. In DNA, the number of adenine bases will always be equal to the number of
_____ bases.
A. cytosine B. guanine C. thymine D. uracil - ANSWER C. Thymine
2. The transcription of a DNA strand with this nucleotide sequence of A-T-A-C-
A-A-C-T-Gresults which mRNA sequence?
A. T-A-T-G-T-T-G-A-C
B. C-A-G-U-U-G-U-A-U
C. U-A-U-G-U-U-G-A-C
D. C-A-G-T-T-G-T-A-T - ANSWER ANS: C
3. Polytomy occurs when
A. the root of a phylogeny has more than one branch; therefore, the
common ancestor of the species is not identified.
B. an internal node of a phylogeny leads to more than two branches;
therefore, the order in which the branchings occurred is not resolved.
C. the order in which consecutive branchings occurred in a phylogenetic
tree is resolved.
D. the tree topology has the least number of character-state changes. -
ANSWER ANS: B
,4. B. an internal node of a phylogeny leads to more than two branches;
therefore, the order in which the branchings occurred is not resolved.
5. Mutations:
A. never affect the fitness of the individual inheriting this change in
DNA.
B. can have a cascade effect on many other genes and their products.
C. in some genes can create mutations in other genes.
D. will always be transmitted to the next generation. - ANSWER ANS
B
6. B. can have a cascade effect on many other genes and their products.
7. Genetic variability in sexually produced offspring is generated during
meiosis through
a. crossing over.
b. genetic recombination.
c. somatic mutations and independent assortment.
d. independent assortment and genetic recombination -
ANSWER ANS D
e. independent assortment and genetic recombination
8. Suppose that the sex of the offspring of a species of fish is determined by
water temperature. In this case, sex is an example of a
a. polyphenism.
, b. quantitative trait.
c. genetic recombination.
d. genetic polymorphism - ANSWER ANS A
b. polyphenism
9. Hardy-Weinberg equilibrium occurs when
a. the frequency of alleles in a population changes as expected,
given the effects of selection.
b. the frequency of alleles in a population does not change
across generations.
c. the change in the frequency of alleles matches the
environmental conditions.
d. the number of genes on a chromosome remains the same
over time. - ANSWER ANS : D
e. the number of genes on a chromosome remains the same
over time.
10.An allele is fixed in a population when
a. no genetic variation exists at a locus within a population
because all the individuals are genetically identical at that
locus.
b. an allele meets the assumptions of Hardy-Weinberg
equilibrium.
Conceptual Actual Exam Questions With
Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update
1. In DNA, the number of adenine bases will always be equal to the number of
_____ bases.
A. cytosine B. guanine C. thymine D. uracil - ANSWER C. Thymine
2. The transcription of a DNA strand with this nucleotide sequence of A-T-A-C-
A-A-C-T-Gresults which mRNA sequence?
A. T-A-T-G-T-T-G-A-C
B. C-A-G-U-U-G-U-A-U
C. U-A-U-G-U-U-G-A-C
D. C-A-G-T-T-G-T-A-T - ANSWER ANS: C
3. Polytomy occurs when
A. the root of a phylogeny has more than one branch; therefore, the
common ancestor of the species is not identified.
B. an internal node of a phylogeny leads to more than two branches;
therefore, the order in which the branchings occurred is not resolved.
C. the order in which consecutive branchings occurred in a phylogenetic
tree is resolved.
D. the tree topology has the least number of character-state changes. -
ANSWER ANS: B
,4. B. an internal node of a phylogeny leads to more than two branches;
therefore, the order in which the branchings occurred is not resolved.
5. Mutations:
A. never affect the fitness of the individual inheriting this change in
DNA.
B. can have a cascade effect on many other genes and their products.
C. in some genes can create mutations in other genes.
D. will always be transmitted to the next generation. - ANSWER ANS
B
6. B. can have a cascade effect on many other genes and their products.
7. Genetic variability in sexually produced offspring is generated during
meiosis through
a. crossing over.
b. genetic recombination.
c. somatic mutations and independent assortment.
d. independent assortment and genetic recombination -
ANSWER ANS D
e. independent assortment and genetic recombination
8. Suppose that the sex of the offspring of a species of fish is determined by
water temperature. In this case, sex is an example of a
a. polyphenism.
, b. quantitative trait.
c. genetic recombination.
d. genetic polymorphism - ANSWER ANS A
b. polyphenism
9. Hardy-Weinberg equilibrium occurs when
a. the frequency of alleles in a population changes as expected,
given the effects of selection.
b. the frequency of alleles in a population does not change
across generations.
c. the change in the frequency of alleles matches the
environmental conditions.
d. the number of genes on a chromosome remains the same
over time. - ANSWER ANS : D
e. the number of genes on a chromosome remains the same
over time.
10.An allele is fixed in a population when
a. no genetic variation exists at a locus within a population
because all the individuals are genetically identical at that
locus.
b. an allele meets the assumptions of Hardy-Weinberg
equilibrium.
