BIO 252 Exam 3 Questions with Correct Answers
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Terms in this set (250)
Which term would be negative control
applied to a regulatory
condition that occurs
when protein is associated
with a particular section of
DNA and greatly reduces
transcription?
In the diagram below, positive control
what type of control,
positive or negative, is
operating?
-{ }( )-|-structrual gene-
^
{regulatory protien}
makes a transcription.
T/F Under a system of True
positive control,
transcription does not
occur unless a regulator
molecule directly
stimulates RNA
production.
,T/F Under a system of True
negative control, genetic
expression occurs unless
some form of regulator
shuts off such expression.
Which term is used to inducible: This term best describes enzymes that are
describe enzymes that are produced only when specific substrates are present in
produced only when the environment to induce their production.
specific substrates are
present in the
environment?
Which term refers to a operon
contiguous genetic
complex that is under
coordinated control?
allosteric
lysogen
attenuation
prototroph
Things to define
operon
Cryan experiments with gut microbes
16 interaction
17 interaction
Which of the following A mutation in the operator sequence. Such a mutation
mutations could lead to could prevent binding of the repressor, allowing
constitutive expression of expression under all conditions.
the genes of the lac
operon?
It ensures that a cell dedicates resources to the
Which of the following production of enzymes involved in lactose
best describes the metabolism only when lactose is available in the
biological role of the lac environment. The cell expends energy to produce the
operon? proteins necessary for lactose metabolism only when
lactose is present.
, T/F The placement of the True. When the repressor binds to the operator, RNA
operator sequence polymerase cannot transcribe the structural genes.
between the promotor
and the structural genes is
critical to the proper
function of the lac operon.
In the lac operon, the splitting the β-linkage of lactose
product of structural gene
lacZ is capable of ________.
Which term most DNA binding protein
appropriately refers to a
regulatory protein in
prokaryotes?
A constitutive mutation in lacOc, lacI-
the lac operon may be of
several types. Name two
types of constitutive
mutations.
T/F Regarding the lactose True
utilization system in E. coli,
a constitutive mutant is
one in which the three
enzymes are produced
regardless of the
presence or absence of
lactose.
Which of the following is a GABA
neurochemical microbes
in our gut can make?
Experiments led by Mice fed lactobacilllus were more calm, behaviorally,
Cryan's group found that when measured via a 6 minutes swim test.
Save
Terms in this set (250)
Which term would be negative control
applied to a regulatory
condition that occurs
when protein is associated
with a particular section of
DNA and greatly reduces
transcription?
In the diagram below, positive control
what type of control,
positive or negative, is
operating?
-{ }( )-|-structrual gene-
^
{regulatory protien}
makes a transcription.
T/F Under a system of True
positive control,
transcription does not
occur unless a regulator
molecule directly
stimulates RNA
production.
,T/F Under a system of True
negative control, genetic
expression occurs unless
some form of regulator
shuts off such expression.
Which term is used to inducible: This term best describes enzymes that are
describe enzymes that are produced only when specific substrates are present in
produced only when the environment to induce their production.
specific substrates are
present in the
environment?
Which term refers to a operon
contiguous genetic
complex that is under
coordinated control?
allosteric
lysogen
attenuation
prototroph
Things to define
operon
Cryan experiments with gut microbes
16 interaction
17 interaction
Which of the following A mutation in the operator sequence. Such a mutation
mutations could lead to could prevent binding of the repressor, allowing
constitutive expression of expression under all conditions.
the genes of the lac
operon?
It ensures that a cell dedicates resources to the
Which of the following production of enzymes involved in lactose
best describes the metabolism only when lactose is available in the
biological role of the lac environment. The cell expends energy to produce the
operon? proteins necessary for lactose metabolism only when
lactose is present.
, T/F The placement of the True. When the repressor binds to the operator, RNA
operator sequence polymerase cannot transcribe the structural genes.
between the promotor
and the structural genes is
critical to the proper
function of the lac operon.
In the lac operon, the splitting the β-linkage of lactose
product of structural gene
lacZ is capable of ________.
Which term most DNA binding protein
appropriately refers to a
regulatory protein in
prokaryotes?
A constitutive mutation in lacOc, lacI-
the lac operon may be of
several types. Name two
types of constitutive
mutations.
T/F Regarding the lactose True
utilization system in E. coli,
a constitutive mutant is
one in which the three
enzymes are produced
regardless of the
presence or absence of
lactose.
Which of the following is a GABA
neurochemical microbes
in our gut can make?
Experiments led by Mice fed lactobacilllus were more calm, behaviorally,
Cryan's group found that when measured via a 6 minutes swim test.
