BIOLOGY 1201 EXAM 3 COMPLETE
QUESTIONS AND ANSWERS GRADED A+
◉ The nuclear membrane's role in the regulation of gene
expression involves _____.
protein activation
translation
protein degradation
regulating the transport of mRNA to the cytoplasm
RNA processing
Answer: regulating the transport of mRNA to the cytoplasm (This
is the role of the nuclear membrane in the regulation of gene
expression.)
◉ What is the function of a spliceosome?
protein activation
translation
protein degradation
regulating the transport of mRNA to the cytoplasm
RNA processing
,Answer: RNA processing (Spliceosomes are involved in RNA
processing.)
◉ Protein-phosphorylating enzymes' role in the regulation of
gene expression involves _____.
protein activation
translation
protein degradation
regulating the transport of mRNA to the cytoplasm
RNA processing
Answer: protein activation(Proteins are often activated by
phosphorylation.)
◉ Which statement(s) about inducible operons is/are correct?
In an inducible operon, the repressor is synthesized in an active
form.
In an inducible operon, an inducer inactivates the repressor.
Inducible enzymes generally function in synthetic pathways that
produce end products from raw materials.
Answer: In an inducible operon, the repressor is synthesized in an
active form.
,In an inducible operon, an inducer inactivates the repressor.
(An inducible operon is usually off but can be turned on when an
inducer interacts with and inactivates the repressor. The enzymes
in an inducible operon generally function in catabolic pathways.
Read about inducible operons.)
◉ Which statement(s) about repressible operons is/are correct?
In a repressible operon, the repressor is synthesized in an active
form.
Repressible operons usually contain genes that code for anabolic
enzymes.
A repressible operon is on unless a co-repressor is present.
Answer: Repressible operons usually contain genes that code for
anabolic enzymes.
A repressible operon is on unless a co-repressor is present.
(A repressible operon is usually on but can be turned off when a
co-repressor interacts with and activates the repressor. The
enzymes in an inducible operon generally function in anabolic
pathways. Read about repressible operons.)
, ◉ How are genes coordinately controlled in eukaryotic cells?
Coordinately controlled genes in eukaryotic cells share a set of
control elements.
Coordinately controlled genes in eukaryotic cells are activated by
the same chemical signals.
Coordinately controlled genes in eukaryotic cells are located
together on the same chromosome.
Answer: Coordinately controlled genes in eukaryotic cells share a
set of control elements.
Coordinately controlled genes in eukaryotic cells are activated by
the same chemical signals.
(In eukaryotes, specific transcription factors bind to control
elements, promoting transcription of coordinately controlled
genes, even if the genes are on separate chromosomes. Read
about coordinately controlled genes in eukaryotes.)
◉ The operon model of the regulation of gene expression in
bacteria was proposed by _____.
Watson and Crick
QUESTIONS AND ANSWERS GRADED A+
◉ The nuclear membrane's role in the regulation of gene
expression involves _____.
protein activation
translation
protein degradation
regulating the transport of mRNA to the cytoplasm
RNA processing
Answer: regulating the transport of mRNA to the cytoplasm (This
is the role of the nuclear membrane in the regulation of gene
expression.)
◉ What is the function of a spliceosome?
protein activation
translation
protein degradation
regulating the transport of mRNA to the cytoplasm
RNA processing
,Answer: RNA processing (Spliceosomes are involved in RNA
processing.)
◉ Protein-phosphorylating enzymes' role in the regulation of
gene expression involves _____.
protein activation
translation
protein degradation
regulating the transport of mRNA to the cytoplasm
RNA processing
Answer: protein activation(Proteins are often activated by
phosphorylation.)
◉ Which statement(s) about inducible operons is/are correct?
In an inducible operon, the repressor is synthesized in an active
form.
In an inducible operon, an inducer inactivates the repressor.
Inducible enzymes generally function in synthetic pathways that
produce end products from raw materials.
Answer: In an inducible operon, the repressor is synthesized in an
active form.
,In an inducible operon, an inducer inactivates the repressor.
(An inducible operon is usually off but can be turned on when an
inducer interacts with and inactivates the repressor. The enzymes
in an inducible operon generally function in catabolic pathways.
Read about inducible operons.)
◉ Which statement(s) about repressible operons is/are correct?
In a repressible operon, the repressor is synthesized in an active
form.
Repressible operons usually contain genes that code for anabolic
enzymes.
A repressible operon is on unless a co-repressor is present.
Answer: Repressible operons usually contain genes that code for
anabolic enzymes.
A repressible operon is on unless a co-repressor is present.
(A repressible operon is usually on but can be turned off when a
co-repressor interacts with and activates the repressor. The
enzymes in an inducible operon generally function in anabolic
pathways. Read about repressible operons.)
, ◉ How are genes coordinately controlled in eukaryotic cells?
Coordinately controlled genes in eukaryotic cells share a set of
control elements.
Coordinately controlled genes in eukaryotic cells are activated by
the same chemical signals.
Coordinately controlled genes in eukaryotic cells are located
together on the same chromosome.
Answer: Coordinately controlled genes in eukaryotic cells share a
set of control elements.
Coordinately controlled genes in eukaryotic cells are activated by
the same chemical signals.
(In eukaryotes, specific transcription factors bind to control
elements, promoting transcription of coordinately controlled
genes, even if the genes are on separate chromosomes. Read
about coordinately controlled genes in eukaryotes.)
◉ The operon model of the regulation of gene expression in
bacteria was proposed by _____.
Watson and Crick
