Biochemistry Online Quiz Online Exam Quiz
Biochemistry Online Quiz GK Quiz. Question and Answers related to Biochemistry Online Quiz. MCQ (Multiple Choice Questions with answers about Biochemistry Online Quiz
Attenuator sequences base-pair to form a stem-and-loop structure rich in ____________
Options
A : A = T
B : G ? C
C : A = C
D : G = C
Which of the following takes place when tryptophan levels are high?
Options
A : Attenuation at the attenuator structure formed by sequences of 3 and 4
B : Ribosomes pauses at the Try codons in sequence 1
C : Formation of paired structure between 2 and 3 sequences prevents attenuation
D : 2:3 structures, unlike the 3:4 attenuator, does not prevent transcription
CAP is ____________
Options
A : Catabolite gene activator protein
B : Catabolite gene repressor protein
C : Anabolite gene activator protein
D : Anabolite gene repressor protein
Which of the following encodes recombinase?
Options
A : fliC
B : fljB
C : hin
D : fljA
Trp repressor is a ____________
Options
A : Homodimer
B : Homotrimer
C : Heterodimer
D : Heterotrimer
Whose interaction with Lex-A facilitates the repressor’s self-cleavage reaction?
Options
A : Rec-A
B : Rec-B
C : Rec-C
D : Rec-D
Formation of the attenuator stem-and-loop structure depends on the events that occur during translation of ____________
Options
A : Regulatory sequence 1
B : Regulatory sequence 2
C : Regulatory sequence 3
D : Regulatory sequence 4
Which of the following takes place when tryptophan levels are low?
Options
A : Ribosomes quickly translates sequence 1
B : Sequence 2 is blocked before sequence 3 is transcribed
C : Ribosomes pauses at the Try codons in sequence 1
D : Attenuation at the attenuator structure formed by sequences of 3 and 4
Which of the following regulatory sequence allows transcription to continue?
Options
A : Sequence 1
B : Sequence 2
C : Sequence 3
D : Sequence 4
When DNA segment is in one orientation ____________
Options
A : The gene for FljB and gene encoding FljA are expressed
B : The gene for FliC are expressed
C : The gene for FljB and gene encoding FljA are not expressed
D : The gene for FljB and gene encoding FljC are not expressed
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