PCB 3023 UCF Exam 2 | UPDATED Questions with 100% Verified
Answers
Question:
Which of the following changes is least likely to arise from a
point mutation in a regulatory region of a gene?
A) A mutation that changes the time on an organism's life
during which a protein is expressed
B) A mutation that eliminates the production of a protein in a
specific cell type
C) A mutation that changes the subcellular localization of a
protein
D) A mutation that increases the level of protein production in
a cell
Answer:
C) A mutation that changes the subcellular localization of a protein
Question:
Which one statement below is true?
A. To develop a new function, evolution essentially builds from
first principles, designing from scratch, to find the best
possible solution.
B. Nearly every instance of DNA duplication leads to a new
functional gene.
C. A pseudogene is very similar to a functional gene but
cannot be expressed because of mutations.
D. Most genes in vertebrates are unique, and only a few genes
are members of multigene families.
E. Horizontal transfer is very rare and thus has had little
influence on the genomes of bacteria.
Answer:
C. A pseudogene is very similar to a functional gene but cannot be expressed because of
mutations.
,Question:
Which of the following is not a mechanism of genetic
variation?
A. purifying selection
B. mutation within the regulatory DNA of a gene
C. gene duplication and divergence
D. exon shuffling
E. mutation within the coding sequence of a gene
Answer:
A. purifying selection
Question:
What is the most general term for a change in a single
nucleotide pair?
A. point mutation
B. frameshift mutation
C. missense mutation
D. nonsense mutation
E. neutral mutation
Answer:
A. point mutation
Question:
Determine whether the following statement is true or false: In
sexually reproducing organisms, only mutations that occur in
the germ line are passed along to progeny.
Answer:
True
Question:
Which of these statements is consistent with the information
presented in the figure?
A. Mutation A is heritable to offspring because the mutation
took place in the germ line.
,B. Mutation A is heritable to offspring because the mutation
took place in a somatic cell.
C. Mutation B is heritable to offspring because the mutation
took place in the germ line.
D. All of the above are correct.
E. None of the above are correct.
Answer:
A. Mutation A is heritable to offspring because the mutation took place in the germ
line.
Question:
It is thought that gene duplications are generated primarily by
which process?
A. sexual reproduction
B. replication of chromosome ends
C. DNA replication and repair
D. homologous recombination
E. transcription
Answer:
D. homologous recombination
Question:
In eukaryotes, what separate component generally encodes
individual protein domains?
A. genes
, B. introns
C. codons
D. mRNAs
E. exons
Answer:
E. exons
Question:
Although vertebrate genomes all contain roughly the same
number of genes, they vary greatly in size; for example,
humans, mice, and dogs have genomes that are three times
the size of the chicken genome. Which of the following could
account for the increased size of mammalian genomes?
A. chromosome breakage
B. the movement of mobile genetic elements
C. chromosomal translocations
D. the accumulation of point mutations
E. purifying selection
Answer:
B. the movement of mobile genetic elements
Question:
Determine whether the following statement is true or false:
Once a gene has been duplicated, only one of the copies is
free to accumulate mutations that might allow it to perform a
slightly different function; the other will remain unchanged.
Answer:
False
Question:
In humans, the globin gene family evolved through which
process?
A. exon shuffling
Answers
Question:
Which of the following changes is least likely to arise from a
point mutation in a regulatory region of a gene?
A) A mutation that changes the time on an organism's life
during which a protein is expressed
B) A mutation that eliminates the production of a protein in a
specific cell type
C) A mutation that changes the subcellular localization of a
protein
D) A mutation that increases the level of protein production in
a cell
Answer:
C) A mutation that changes the subcellular localization of a protein
Question:
Which one statement below is true?
A. To develop a new function, evolution essentially builds from
first principles, designing from scratch, to find the best
possible solution.
B. Nearly every instance of DNA duplication leads to a new
functional gene.
C. A pseudogene is very similar to a functional gene but
cannot be expressed because of mutations.
D. Most genes in vertebrates are unique, and only a few genes
are members of multigene families.
E. Horizontal transfer is very rare and thus has had little
influence on the genomes of bacteria.
Answer:
C. A pseudogene is very similar to a functional gene but cannot be expressed because of
mutations.
,Question:
Which of the following is not a mechanism of genetic
variation?
A. purifying selection
B. mutation within the regulatory DNA of a gene
C. gene duplication and divergence
D. exon shuffling
E. mutation within the coding sequence of a gene
Answer:
A. purifying selection
Question:
What is the most general term for a change in a single
nucleotide pair?
A. point mutation
B. frameshift mutation
C. missense mutation
D. nonsense mutation
E. neutral mutation
Answer:
A. point mutation
Question:
Determine whether the following statement is true or false: In
sexually reproducing organisms, only mutations that occur in
the germ line are passed along to progeny.
Answer:
True
Question:
Which of these statements is consistent with the information
presented in the figure?
A. Mutation A is heritable to offspring because the mutation
took place in the germ line.
,B. Mutation A is heritable to offspring because the mutation
took place in a somatic cell.
C. Mutation B is heritable to offspring because the mutation
took place in the germ line.
D. All of the above are correct.
E. None of the above are correct.
Answer:
A. Mutation A is heritable to offspring because the mutation took place in the germ
line.
Question:
It is thought that gene duplications are generated primarily by
which process?
A. sexual reproduction
B. replication of chromosome ends
C. DNA replication and repair
D. homologous recombination
E. transcription
Answer:
D. homologous recombination
Question:
In eukaryotes, what separate component generally encodes
individual protein domains?
A. genes
, B. introns
C. codons
D. mRNAs
E. exons
Answer:
E. exons
Question:
Although vertebrate genomes all contain roughly the same
number of genes, they vary greatly in size; for example,
humans, mice, and dogs have genomes that are three times
the size of the chicken genome. Which of the following could
account for the increased size of mammalian genomes?
A. chromosome breakage
B. the movement of mobile genetic elements
C. chromosomal translocations
D. the accumulation of point mutations
E. purifying selection
Answer:
B. the movement of mobile genetic elements
Question:
Determine whether the following statement is true or false:
Once a gene has been duplicated, only one of the copies is
free to accumulate mutations that might allow it to perform a
slightly different function; the other will remain unchanged.
Answer:
False
Question:
In humans, the globin gene family evolved through which
process?
A. exon shuffling
