Genetics Exam 4 Test Bank Questions
latest updates!!! 2026-2027 |
correct solutions with quiz &
answers | highly graded a+
The subunit(s) of an E. coli RNA polymerase that recognize the promoter sequence in
the DNA is/are: - CORRECT ANSWERS-sigma (initial step of RNA synthesis and
transcription is RNA polymerase sigma binding to promoter)
The nucleotide sequence TATAAT is commonly associated with: - CORRECT
ANSWERS-the -10 region of bacterial chromosomes
An intrinsic transcriptional terminator in a prokaryotic cell would likely be: - CORRECT
ANSWERS-a nucleotide sequence that forms a hairpin with a GC-rich stem followed by
a string of U's when transcribed
The bonds that bind the alpha and beta subunits of an enzyme to each other are in fact
responsible for the protein's:
a) primary structure
b) secondary structure
c) tertiary structure
d) quaternary structure - CORRECT ANSWERS-secondary structure
An example of a developmentally regulated gene family would be: - CORRECT
ANSWERS-globin genes
Dicer and RISC are involved in the process known as: - CORRECT ANSWERS-RNA
[gene] silencing
Which of the following is NOT an example of a posttranslational modification? a) N-
terminal amino acid(s) commonly removed or modified b) Signal/targeting peptide
removal c) Phosphorylation, methylation, acetylation d) glycosylation e) All of the above
are example of PM - CORRECT ANSWERS-All of the above are examples of
posttranslational modifications
, Which of the following is NOT an example of a posttranscriptional modification? a)
Capping the 5' end of a pre-mRNA b) intron removal c) RNA editing d) addition of
poly(a) to the 5' end of a pre-mRNA e) all of the above are correct examples -
CORRECT ANSWERS-e) all of the the above are correct examples of common
posttranscriptional modifications of RNAs in higher Eukaryotes
The simple test used to assess mutagenicity of compounds using Salmonella
auxotrophs was developed by: - CORRECT ANSWERS-Bruce Ames
Transposable elements were first discovered by Barbara McClintock who was studying
what organism? - CORRECT ANSWERS-Zea Mays
A human genetic disorder that results from an inability to carry out excision repair of
pyrimidine dimers is: - CORRECT ANSWERS-xeroderma pigmentosum
A human gene is found to have a number of CpG dinucleotides that are methylated at
the C base. It is very likely that this gene: - CORRECT ANSWERS-is turned off
A very strong indicator that cancer involves the mutation of multiple genes is the fact
that: - CORRECT ANSWERS-The annual incidence rate of all forms of cancer goes up
with age
A group of genes that normally regulate cell cycle checkpoints and/or initiate the
process of apoptosis would be the: - CORRECT ANSWERS-signal transduction
pathway encoding genes
An enhanceosome is very likely to have: - CORRECT ANSWERS-DNA-binding domain
In the context of the trp operon of E. coli, the molecule tryptophan is the: - CORRECT
ANSWERS-corepressor
The single human gene whose mutation is associated most commonly with the
cancerous state is: - CORRECT ANSWERS-p53
An example of gene expression that is regulated by altering the half-life of the mRNA is:
- CORRECT ANSWERS-Tubulin expression in eukaryotes
An example of a gene or genes that are regulated by catabolite repression in yeast
would be: - CORRECT ANSWERS-GAL 10 and GAL 1
A chromosome territory refers to: - CORRECT ANSWERS-A discrete domain of the
nucleus occupied by a chromosome
The trp repressor binds to the region of the operon best referred to as the: - CORRECT
ANSWERS-operator
latest updates!!! 2026-2027 |
correct solutions with quiz &
answers | highly graded a+
The subunit(s) of an E. coli RNA polymerase that recognize the promoter sequence in
the DNA is/are: - CORRECT ANSWERS-sigma (initial step of RNA synthesis and
transcription is RNA polymerase sigma binding to promoter)
The nucleotide sequence TATAAT is commonly associated with: - CORRECT
ANSWERS-the -10 region of bacterial chromosomes
An intrinsic transcriptional terminator in a prokaryotic cell would likely be: - CORRECT
ANSWERS-a nucleotide sequence that forms a hairpin with a GC-rich stem followed by
a string of U's when transcribed
The bonds that bind the alpha and beta subunits of an enzyme to each other are in fact
responsible for the protein's:
a) primary structure
b) secondary structure
c) tertiary structure
d) quaternary structure - CORRECT ANSWERS-secondary structure
An example of a developmentally regulated gene family would be: - CORRECT
ANSWERS-globin genes
Dicer and RISC are involved in the process known as: - CORRECT ANSWERS-RNA
[gene] silencing
Which of the following is NOT an example of a posttranslational modification? a) N-
terminal amino acid(s) commonly removed or modified b) Signal/targeting peptide
removal c) Phosphorylation, methylation, acetylation d) glycosylation e) All of the above
are example of PM - CORRECT ANSWERS-All of the above are examples of
posttranslational modifications
, Which of the following is NOT an example of a posttranscriptional modification? a)
Capping the 5' end of a pre-mRNA b) intron removal c) RNA editing d) addition of
poly(a) to the 5' end of a pre-mRNA e) all of the above are correct examples -
CORRECT ANSWERS-e) all of the the above are correct examples of common
posttranscriptional modifications of RNAs in higher Eukaryotes
The simple test used to assess mutagenicity of compounds using Salmonella
auxotrophs was developed by: - CORRECT ANSWERS-Bruce Ames
Transposable elements were first discovered by Barbara McClintock who was studying
what organism? - CORRECT ANSWERS-Zea Mays
A human genetic disorder that results from an inability to carry out excision repair of
pyrimidine dimers is: - CORRECT ANSWERS-xeroderma pigmentosum
A human gene is found to have a number of CpG dinucleotides that are methylated at
the C base. It is very likely that this gene: - CORRECT ANSWERS-is turned off
A very strong indicator that cancer involves the mutation of multiple genes is the fact
that: - CORRECT ANSWERS-The annual incidence rate of all forms of cancer goes up
with age
A group of genes that normally regulate cell cycle checkpoints and/or initiate the
process of apoptosis would be the: - CORRECT ANSWERS-signal transduction
pathway encoding genes
An enhanceosome is very likely to have: - CORRECT ANSWERS-DNA-binding domain
In the context of the trp operon of E. coli, the molecule tryptophan is the: - CORRECT
ANSWERS-corepressor
The single human gene whose mutation is associated most commonly with the
cancerous state is: - CORRECT ANSWERS-p53
An example of gene expression that is regulated by altering the half-life of the mRNA is:
- CORRECT ANSWERS-Tubulin expression in eukaryotes
An example of a gene or genes that are regulated by catabolite repression in yeast
would be: - CORRECT ANSWERS-GAL 10 and GAL 1
A chromosome territory refers to: - CORRECT ANSWERS-A discrete domain of the
nucleus occupied by a chromosome
The trp repressor binds to the region of the operon best referred to as the: - CORRECT
ANSWERS-operator
