1
BIO1610 GENETICS EXAM NEWEST 2025 ACTUAL
EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+
What information can not be obtained from the sequence of a gene?
-Relationship between two species
-if gene is methylated
-effects of mutation on gene function
-amino acid sequence of the protein - (answers)if the gene is methylated
What is the polymerase chain reaction (PCR)? - (answers)A method to amplify a
fragment of DNA
True or false? Comparison of the sequences of the same gene across species can
give some insight into the existence of a common ancestor with that gene. -
(answers)True
True or false? The Taq enzyme is a type of DNA polymerase that allows
researchers to separate the DNA strands during the annealing step of the PCR
cycle without destroying the polymerase. - (answers)False.
Taq polymerase is derived from a species of bacteria living in hot springs, which
makes it stable at the high temperature required for the denaturation step of
PCR.
1
, 2
How many DNA molecules would there be after four rounds of PCR if the initial
reaction mixture contained two molecules? - (answers)32
During which step in the PCR cycle are nucleotides used?
-annealing
-extension
-denaturation
-all of the above - (answers)Extension
During which step in the PCR cycle do primers form bonds with a single-stranded
template?
-annealing
-extension
-denaturation
-all of the above - (answers)annealing
Archaeologists unearthed a human skull with a small dried fragment of the scalp
still attached. They extracted a tiny amount of DNA from the scalp tissue. How
could they obtain sufficient DNA for an analysis of the ancient human's genes? -
(answers)PCR
A paleontologist has recovered a bit of tissue from the 400-year-old preserved
skin of an extinct dodo (a bird). To compare a specific region of the DNADNA from
the sample with DNADNA from living birds, which of the following would be most
2
, 3
useful for increasing the amount of dodo DNADNA available for testing? -
(answers)PCR
Which of the following reasons best explains why sequencing an entire genome,
such as that of C. elegans, a nematode, is important for genetic research? -
(answers)A sequence that is found to have a particular function in the nematode
is likely to have a closely related function in vertebrates.
Pax-6 is a gene involved in eye formation that has homologues in invertebrates
and vertebrates. The fact that expressing the mouse form of Pax-6 in a fruit fly
leads to a compound fly eye (not a single lens mouse eye) suggests which of the
following characteristics of this gene? - (answers)Pax-6 gene is highly conserved
and shows shared evolutionary ancestry.
PCR and cellular DNA replication share which of the following characteristics?
-requires DNA primer to begin extension
-require helicase to separate DNA template strands
-form Okazaki fragments
-extends new strand in 5' to 3' direction - (answers)extend new strand in 5 to 3
direction
Submit
What information is critical to the success of polymerase chain reaction (PCR)?
3
BIO1610 GENETICS EXAM NEWEST 2025 ACTUAL
EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+
What information can not be obtained from the sequence of a gene?
-Relationship between two species
-if gene is methylated
-effects of mutation on gene function
-amino acid sequence of the protein - (answers)if the gene is methylated
What is the polymerase chain reaction (PCR)? - (answers)A method to amplify a
fragment of DNA
True or false? Comparison of the sequences of the same gene across species can
give some insight into the existence of a common ancestor with that gene. -
(answers)True
True or false? The Taq enzyme is a type of DNA polymerase that allows
researchers to separate the DNA strands during the annealing step of the PCR
cycle without destroying the polymerase. - (answers)False.
Taq polymerase is derived from a species of bacteria living in hot springs, which
makes it stable at the high temperature required for the denaturation step of
PCR.
1
, 2
How many DNA molecules would there be after four rounds of PCR if the initial
reaction mixture contained two molecules? - (answers)32
During which step in the PCR cycle are nucleotides used?
-annealing
-extension
-denaturation
-all of the above - (answers)Extension
During which step in the PCR cycle do primers form bonds with a single-stranded
template?
-annealing
-extension
-denaturation
-all of the above - (answers)annealing
Archaeologists unearthed a human skull with a small dried fragment of the scalp
still attached. They extracted a tiny amount of DNA from the scalp tissue. How
could they obtain sufficient DNA for an analysis of the ancient human's genes? -
(answers)PCR
A paleontologist has recovered a bit of tissue from the 400-year-old preserved
skin of an extinct dodo (a bird). To compare a specific region of the DNADNA from
the sample with DNADNA from living birds, which of the following would be most
2
, 3
useful for increasing the amount of dodo DNADNA available for testing? -
(answers)PCR
Which of the following reasons best explains why sequencing an entire genome,
such as that of C. elegans, a nematode, is important for genetic research? -
(answers)A sequence that is found to have a particular function in the nematode
is likely to have a closely related function in vertebrates.
Pax-6 is a gene involved in eye formation that has homologues in invertebrates
and vertebrates. The fact that expressing the mouse form of Pax-6 in a fruit fly
leads to a compound fly eye (not a single lens mouse eye) suggests which of the
following characteristics of this gene? - (answers)Pax-6 gene is highly conserved
and shows shared evolutionary ancestry.
PCR and cellular DNA replication share which of the following characteristics?
-requires DNA primer to begin extension
-require helicase to separate DNA template strands
-form Okazaki fragments
-extends new strand in 5' to 3' direction - (answers)extend new strand in 5 to 3
direction
Submit
What information is critical to the success of polymerase chain reaction (PCR)?
3
