Activators and Repressors Participate in Positive and Negative Regulation Online Exam Quiz
Activators and Repressors Participate in Positive and Negative Regulation GK Quiz. Question and Answers related to Activators and Repressors Participate in Positive and Negative Regulation. MCQ (Multiple Choice Questions with answers about Activators and Repressors Participate in Positive and Negative Regulation
According to the repressor of lac operon which of the following are false?
Options
A : It is the gene product of the regulatory gene
B : It binds to the promoter region
C : It blocks the transcription of structural genes
D : It combines with allolactose and thus does not bind to the operon
Attenuator in the tryptophan operon is the __
Options
A : Operator sequence
B : Non-transcribed region within the operon
C : Leader sequence for the site of RNA polymerase binding
D : Leader sequence in the tryptophan mRNA coding for many tryptophan residues
Defects in which regions can affect the activity of the lac operon?
Options
A : Promoter
B : i
C : Terminator
D : i and o
How many enzymes are produced in the lac operon under the same promoter?
Options
A : 4
B : 3
C : 2
D : 1
If the lac operon of the genome of bacteria is always active it has a defect in which region of the operon?
Options
A : i
B : o
C : Promoter
D : Structural gene
If there is an insertion mutation in the operator of the lac operon, the expression of the lac structural gene will be __
Options
A : Resistant to catabolic expression
B : Unexpressed
C : Constitutively expressed
D : Permanently disabled
In the case of lac operon, the gene expression is inhibited by __
Options
A : Presence of lactose
B : Interaction of repressor with lactose
C : Interaction of repressor with operator
D : Interaction of lactose with operator
Lac operon follows a trans-acting control mechanism.
Options
A : TRUE
B : FALSE
C : -
D : -
Mutation in the regulatory gene of a positively controlled operon can be identified by __
Options
A : Operon induction
B : Operon repression
C : High expression
D : Constitutive expression
Presence of lactose itself induces the production of ?-galactoside transferase.
Options
A : TRUE
B : FALSE
C : -
D : -
Activators and Repressors Participate in Positive and Negative Regulation more Online Exam Quiz
Hardness Test - Torsion Stress for Large Plastic Strains
Components Interconnection and Impedance Matching
Protected Virtual Address Mode (PVAM) -2
Handling Errors and Processing Command Options
Advanced Problems on Network Theorems - 2