Cytogenetics Operons Trp Online Exam Quiz
Cytogenetics Operons Trp GK Quiz. Question and Answers related to Cytogenetics Operons Trp. MCQ (Multiple Choice Questions with answers about Cytogenetics Operons Trp
How many stem loop structures play important role in complete system of tryptophan gene regulation?
Options
A : 3
B : 4
C : 6
D : 8
Which of this mode of trp regulation is not possible in eukaryotes?
Options
A : Anti-TRAP Trp-TRAP
B : Anti-Terminator stabilization
C : Attenuation of trp
D : Trp-TRAP binding
A Lac repressor is a tetramer repressed when bound to the inducer. The trp repressor is a ____________________
Options
A : Dimer inactivated when bound to the inducer
B : Dimer activated on inducer binding
C : Tetramer inactivated on inducer binding
D : Tetramer activated on inducer binding
Which of these properties do not agree with trp operon attenuator?
Options
A : It brings about repression of trp operon
B : It consists of one stem loop system
C : It has two codons for tryptophan in sequence
D : Ribosome stalls at the attenuator
Which of these operons is anabolic?
Options
A : Lac
B : Ara
C : Trp
D : Phe
Which operon behaves similar to Bacillus subtilis trp operon in terms of attenuation?
Options
A : Lac operon
B : His operon
C : Phe operon
D : Ara operon
When uncharged tRNA concentration is low what will you expect as the activity of tryptophan operon?
Options
A : Low
B : Medium
C : High
D : Very high
We know that lactose has a positive impact on the activity of the lac operon. Tryptophan’s presence has a ________________
Options
A : Positive feedback
B : Negative feedback
C : No difference
D : Highly positive impact
If in an experiment you mutate the two trp codons in the attenuator to ala codon what will be the impact on repression?
Options
A : Repression will be normal
B : Reduced repression
C : No repression so the gene would be constitutively turned on
D : Activation will take place
Which of these systems give the best mode for turning trp operon off?
Options
A : Repressor
B : Attenuator
C : Repressor with a downstream poly A tail
D : Repressor with an attenuator
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