Bio 1201 Exam 3 comprehensive
Questions and Answers with Verified
Solutions
Question 1:
Enzyme complexes that break down protein are called _____. lipases
ubiquitins amylase proteasomes nucleases
Answer:
proteasomes (Proteasomes are enzyme complexes that break down
proteins.)
Question 2:
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.)
Question 3:
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.)
,Question 4:
Protein-phosphorylating enzymes' role in the regulation of gene
expression involves _____. protein activation translation protein
degradation
Answer:
protein activation(Proteins are often activated by phosphorylation.)
Question 5:
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.)
Question 6:
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
, Question 7:
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.)
Question 8:
The operon model of the regulation of gene expression in bacteria was
proposed by _____. Watson and Crick Franklin Darwin Jacob and Monod
Mendel
Answer:
Jacob and Monod In 1961 Jacob and Monod proposed the operon model
of gene regulation.
Question 9:
Which of these is NOT a component of the lac operon? lactose-utilization
genes only
Answer:
regulatory gene only The regulatory gene, while not a part of the operon,
plays a role in
Questions and Answers with Verified
Solutions
Question 1:
Enzyme complexes that break down protein are called _____. lipases
ubiquitins amylase proteasomes nucleases
Answer:
proteasomes (Proteasomes are enzyme complexes that break down
proteins.)
Question 2:
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.)
Question 3:
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.)
,Question 4:
Protein-phosphorylating enzymes' role in the regulation of gene
expression involves _____. protein activation translation protein
degradation
Answer:
protein activation(Proteins are often activated by phosphorylation.)
Question 5:
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.)
Question 6:
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
, Question 7:
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.)
Question 8:
The operon model of the regulation of gene expression in bacteria was
proposed by _____. Watson and Crick Franklin Darwin Jacob and Monod
Mendel
Answer:
Jacob and Monod In 1961 Jacob and Monod proposed the operon model
of gene regulation.
Question 9:
Which of these is NOT a component of the lac operon? lactose-utilization
genes only
Answer:
regulatory gene only The regulatory gene, while not a part of the operon,
plays a role in
