BIO 1330 Exam 4 2025 Questions
and Answers 100% Pass
Which of the following steps for terminating translation are correct and in the right
order? - ✔✔1. Release factor binds to stop codon
2. Polypeptide and uncharged tRNAs are released
3. Ribosome subunits separate
Which of the following best describes the significance of the TATA box in eukaryotic
promoters? - ✔✔It is the binding site for a transcription factor.
The release factor (RF) __________. - ✔✔binds to the stop codon in the A site in place of
a tRNA
Which of the following statements best describes the ribosome binding site? - ✔✔The
ribosome binding site is where the small ribosome subunit binds; it is located upstream
of the start codon.
In transcription, ___________ produces an RNA molecule with a base sequence
complementary to the base sequence of the _____________. - ✔✔RNA polymerase; DNA
template strand
Modifications needed for converting a primary transcript into a mature RNA are called
________. - ✔✔RNA processing
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,An advantage of introns is that they __________. - ✔✔allow expression of different exon
combinations from one gene
RNA polymerase reads the template strand. The non-template strand is ________. -
✔✔the coding strand—its sequence matches the sequence of the RNA that is
transcribed from the template strand
A gene is a __________. - ✔✔coding and regulatory sequence that directs the production
of one or more related polypeptides or RNAs
What prevents the DNA coding strand and RNA from matching exactly in base
sequence? - ✔✔RNA has the base uracil (U) rather than the thymine (T) found in the
coding strand. Adenine (A) in the DNA template strand specifies a U in the
complementary RNA strand.
A primary transcript in the nucleus of a eukaryotic cell is __________ the functional
mRNA, whereas a primary transcript in a bacterial cell is __________ the functional
mRNA. - ✔✔larger than; the same size as
During RNA splicing, which molecular component of the spliceosome catalyzes the
excision reaction? - ✔✔snRNA
Where does an amino acid attach to a tRNA? - ✔✔At the 3′ end
Researchers report that a protein is encoded by a gene with four promoters that give
rise to at least eight different mRNAs. What mechanism could account for the
production of these different mRNAs from the same gene? - ✔✔Alternative splicing
Which of the following best describes the processing of eukaryotic pre-mRNAs in the
proper order? - ✔✔The addition of a 5′ cap; removal of introns; Poly (A) tail
How does RNA polymerase begin transcription in eukaryotes? - ✔✔By binding to
promoter sequences in DNA
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, Ribosomes translate mRNAs into proteins with the help of ____________. - ✔✔adaptor
molecules called tRNAs
The ____________ of the eukaryotic promoter is analogous to the __________ of the
bacterial promoter. - ✔✔TATA box; -1 box
In addition to RNA polymerase, transcription in eukaryotes requires which of the
following? - ✔✔Several transcription factors
Which option lists the steps of transcription initiation in the proper order? -
✔✔Chromatin remodeling, exposure of promoter and regulatory sequences, assembly
of proteins, proteins contact core promoter
Which of the following statements best describes a eukaryotic promoter? - ✔✔It is
found upstream of the gene and contains the TATA box.
Which of the following is involved in the first step of initiating transcription? -
✔✔TATA-binding protein (TBP)
Which of the following will speed up the rate of transcription? - ✔✔Activators
Proteins that stop or slow the cell cycle when conditions are unfavorable for cell
division are called ________. - ✔✔tumor suppressors
Which of the following statements about the p53 protein (a tumor suppressor) is true? -
✔✔It activates genes that induce apoptosis in cells with extensively damaged DNA.
Which of the following will decrease the rate of transcription? - ✔✔Repressors
How do histone deacetylases impact chromatin structure? - ✔✔They deacetylate
histones, making them more positively charged, which causes the chromatin to
condense.
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and Answers 100% Pass
Which of the following steps for terminating translation are correct and in the right
order? - ✔✔1. Release factor binds to stop codon
2. Polypeptide and uncharged tRNAs are released
3. Ribosome subunits separate
Which of the following best describes the significance of the TATA box in eukaryotic
promoters? - ✔✔It is the binding site for a transcription factor.
The release factor (RF) __________. - ✔✔binds to the stop codon in the A site in place of
a tRNA
Which of the following statements best describes the ribosome binding site? - ✔✔The
ribosome binding site is where the small ribosome subunit binds; it is located upstream
of the start codon.
In transcription, ___________ produces an RNA molecule with a base sequence
complementary to the base sequence of the _____________. - ✔✔RNA polymerase; DNA
template strand
Modifications needed for converting a primary transcript into a mature RNA are called
________. - ✔✔RNA processing
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 1
,An advantage of introns is that they __________. - ✔✔allow expression of different exon
combinations from one gene
RNA polymerase reads the template strand. The non-template strand is ________. -
✔✔the coding strand—its sequence matches the sequence of the RNA that is
transcribed from the template strand
A gene is a __________. - ✔✔coding and regulatory sequence that directs the production
of one or more related polypeptides or RNAs
What prevents the DNA coding strand and RNA from matching exactly in base
sequence? - ✔✔RNA has the base uracil (U) rather than the thymine (T) found in the
coding strand. Adenine (A) in the DNA template strand specifies a U in the
complementary RNA strand.
A primary transcript in the nucleus of a eukaryotic cell is __________ the functional
mRNA, whereas a primary transcript in a bacterial cell is __________ the functional
mRNA. - ✔✔larger than; the same size as
During RNA splicing, which molecular component of the spliceosome catalyzes the
excision reaction? - ✔✔snRNA
Where does an amino acid attach to a tRNA? - ✔✔At the 3′ end
Researchers report that a protein is encoded by a gene with four promoters that give
rise to at least eight different mRNAs. What mechanism could account for the
production of these different mRNAs from the same gene? - ✔✔Alternative splicing
Which of the following best describes the processing of eukaryotic pre-mRNAs in the
proper order? - ✔✔The addition of a 5′ cap; removal of introns; Poly (A) tail
How does RNA polymerase begin transcription in eukaryotes? - ✔✔By binding to
promoter sequences in DNA
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 2
, Ribosomes translate mRNAs into proteins with the help of ____________. - ✔✔adaptor
molecules called tRNAs
The ____________ of the eukaryotic promoter is analogous to the __________ of the
bacterial promoter. - ✔✔TATA box; -1 box
In addition to RNA polymerase, transcription in eukaryotes requires which of the
following? - ✔✔Several transcription factors
Which option lists the steps of transcription initiation in the proper order? -
✔✔Chromatin remodeling, exposure of promoter and regulatory sequences, assembly
of proteins, proteins contact core promoter
Which of the following statements best describes a eukaryotic promoter? - ✔✔It is
found upstream of the gene and contains the TATA box.
Which of the following is involved in the first step of initiating transcription? -
✔✔TATA-binding protein (TBP)
Which of the following will speed up the rate of transcription? - ✔✔Activators
Proteins that stop or slow the cell cycle when conditions are unfavorable for cell
division are called ________. - ✔✔tumor suppressors
Which of the following statements about the p53 protein (a tumor suppressor) is true? -
✔✔It activates genes that induce apoptosis in cells with extensively damaged DNA.
Which of the following will decrease the rate of transcription? - ✔✔Repressors
How do histone deacetylases impact chromatin structure? - ✔✔They deacetylate
histones, making them more positively charged, which causes the chromatin to
condense.
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 3
