Transcription

 

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Transcription

Question 1
Which of the following statement defines a replicon?
A
A DNA molecule that encodes pili for conjugation
B
A DNA molecule that is able to replicate and be maintained
C
A DNA template which is used in transcription
D
The enzyme responsible for transposition

Question 2
Which of these catalyzes the synthesis of RNA from a DNA template?
A
DNA gyrase
B
DNA ligase
C
DNA polymerase
D
RNA polymerase

Question 3
Which of the following enzyme(s) is/are required for lactose fermentation?
A
Transacetylase
B
$\beta$-galactosidase
C
Galactoside permease
D
All of these

Question 4
A specific ..... factor helps RNA polymerase bind to late promoters and transcribe late genes.
A
sigma
B
beta
C
delta
D
gamma

Question 5
A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called
A
activation
B
attenuation
C
corepression
D
desiccation

Question 6
Which eukaryotic RNA polymerase makes tRNA's?
A
RNA polymerase 1
B
RNA polymerase 2
C
RNA polymerase 3
D
Any of these

Question 7
The location of first hexameric sequence typically found in pro-karyotic promoters is
A
at the transcription start site
B
approximately 35 bases upstream of the transcription start site
C
approximately 10 bases upstream of the transcription start site
D
approximately 25 bases upstream of the transcription start site

Question 8
What is the usual sequence of a Pribnow box?
A
AUAUA
B
TATAAT
C
UUUUU
D
TTGACA

Question 9
The components found in all prokaryotic transcription terminators is
A
a poly-U region
B
Rho factor
C
a hairpin structure
D
none of these

Question 10
Which of the following component of RNA polymerase facilitates the recognition of promoter sequences?
A
a subunit
B
b subunit
C
s subunit
D
c subunit
There are 10 questions to complete.

 

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