GCD 3022 EXAM III QUESTIONS
COMPLETE WITH 100% CORRECT
ANSWERS
\.gene regulation refers to the ability of gene expression to (. ) depending on
different conditions. - ANSWERS-Vary
\.The most common way to regulate gene expression in bacteria is by influencing
the initiation of (. ). This means the rate of RNA synthesis can be (. ) - ANSWERS-
transcription, increased or decreased
\.Genes that are unregulated are termed - ANSWERS-constitutive genes
\.Gene regulation can happen anywhere during the process of gene expression.
True or false? - ANSWERS-True
\.During transcription in bacteria, (. ) proteins bind to DNA and control the rate of
(. ). - ANSWERS-genetic regulatory, transcription
\.Transcriptional regulation in bacteria involves two main proteins called -
ANSWERS-Activators and repressors
,\.Negative control refers to regulation done by a (. ) protein - ANSWERS-repressor
\.Positive control refers to regulation done by a (. ) protein - ANSWERS-activator
\.Small effector molecules affect transcriptional regulation. They bind to
regulatory proteins but not to - ANSWERS-DNA directly
\.S.E.M can increase transcription. These molecules are called - ANSWERS-
inducers
\.S.E.M can decrease transcription. These molecules are called - ANSWERS-
inhibitors
\.Inhibitors may bind to activators and (. ) them from binding to the DNA -
ANSWERS-prevent
\.A corepressor ( a type of SEM that decreases transcription) may bind to a
repressor and (. ) in binding to DNA - ANSWERS-assist
\.an inducer may bind to an activator and (. ) them in binding to DNA - ANSWERS-
assist
\.an inducer may bind to a repressor and (. ) them from binding to DNA -
ANSWERS-prevent
, \.Genes that are regulated by inducers are termed - ANSWERS-inducible
\.Genes that are regulated by repressors are termed - ANSWERS-repressible.
\.Is the lac operon an example of an inducible gene or a repressible gene? -
ANSWERS-inducible
\.A repressor is a __________ that _________ transcription. - ANSWERS-
regulatory protein, inhibits
\.Which of the following combinations will cause the rate of transcription to
increase?
A repressor plus an inducer
A repressor plus a corepressor
An activator plus an inhibitor - ANSWERS-A repressor plus an inducer
\.This is a group of two or more genes that are under the transcriptional control of
a single promoter - ANSWERS-an operon
\.an operon encodes a (. ) mRNA, which is an RNA that contains the sequences of
two or more genes - ANSWERS-polycistronic
\.What is the function of the lacZ protein encoding gene? - ANSWERS-It encodes
beta-galactosidase which...
-enzymatically cleaves lactose and lactose analogs
COMPLETE WITH 100% CORRECT
ANSWERS
\.gene regulation refers to the ability of gene expression to (. ) depending on
different conditions. - ANSWERS-Vary
\.The most common way to regulate gene expression in bacteria is by influencing
the initiation of (. ). This means the rate of RNA synthesis can be (. ) - ANSWERS-
transcription, increased or decreased
\.Genes that are unregulated are termed - ANSWERS-constitutive genes
\.Gene regulation can happen anywhere during the process of gene expression.
True or false? - ANSWERS-True
\.During transcription in bacteria, (. ) proteins bind to DNA and control the rate of
(. ). - ANSWERS-genetic regulatory, transcription
\.Transcriptional regulation in bacteria involves two main proteins called -
ANSWERS-Activators and repressors
,\.Negative control refers to regulation done by a (. ) protein - ANSWERS-repressor
\.Positive control refers to regulation done by a (. ) protein - ANSWERS-activator
\.Small effector molecules affect transcriptional regulation. They bind to
regulatory proteins but not to - ANSWERS-DNA directly
\.S.E.M can increase transcription. These molecules are called - ANSWERS-
inducers
\.S.E.M can decrease transcription. These molecules are called - ANSWERS-
inhibitors
\.Inhibitors may bind to activators and (. ) them from binding to the DNA -
ANSWERS-prevent
\.A corepressor ( a type of SEM that decreases transcription) may bind to a
repressor and (. ) in binding to DNA - ANSWERS-assist
\.an inducer may bind to an activator and (. ) them in binding to DNA - ANSWERS-
assist
\.an inducer may bind to a repressor and (. ) them from binding to DNA -
ANSWERS-prevent
, \.Genes that are regulated by inducers are termed - ANSWERS-inducible
\.Genes that are regulated by repressors are termed - ANSWERS-repressible.
\.Is the lac operon an example of an inducible gene or a repressible gene? -
ANSWERS-inducible
\.A repressor is a __________ that _________ transcription. - ANSWERS-
regulatory protein, inhibits
\.Which of the following combinations will cause the rate of transcription to
increase?
A repressor plus an inducer
A repressor plus a corepressor
An activator plus an inhibitor - ANSWERS-A repressor plus an inducer
\.This is a group of two or more genes that are under the transcriptional control of
a single promoter - ANSWERS-an operon
\.an operon encodes a (. ) mRNA, which is an RNA that contains the sequences of
two or more genes - ANSWERS-polycistronic
\.What is the function of the lacZ protein encoding gene? - ANSWERS-It encodes
beta-galactosidase which...
-enzymatically cleaves lactose and lactose analogs
