WorksheetsOperon
Total questions: 20
Worksheet time: 15mins
What type of operon is the trp (tryptophan) operon?
inducible
repressible
positive control
promoible
In the lac operon the inducer is
allolactose
glucose
galactose
all of the above
What is 1 in the diagram?
RNA polymerase
Inducer
Repressor
Operator
What is 2 in the diagram?
RNA polymerase
Inducer
Repressor
Operator
What is 4 in the diagram?
RNA polymerase
Inducer
Repressor
Operator
What is 5 in the diagram?
RNA polymerase
Inducer
Repressor
Operator
In the bottom picture the operon is
on
off
Which of the following is not a structural gene?
lac z
lac y
lac a
lac I
The tryptophan operon is
permanently turned on.
turned on when tryptophan is present in the growth medium.
turned off only when glucose is present in the growth medium.
turned off when tryptophan is added to the growth medium.
What does a promoter do?
it allows a gene to be transcribed
it creates a DNA segment
it is another word for ribosomes
it is another word for RNA
Ara operon will be turned off once the araC binds to the operator of the _________ and binds to___________
araO2 , araI
araC , araB
araO1, araO2
araA, araD
Structural genes of ara operon are
ara D,A,B
ara B,A,D
ara Z,Y,A
ara E,D,C,B,A
In attenuation, the operon will stop once sequence _________and _________ basepair
1,2
2,3
3,4
1,3
Trp operon is an example of operon that operates ___________
ababolically
catabolically
Structural genes of trp operon encodes for
tryptophan synthetase
tryptophan dioxygenase
tryptophan kinase
tryptophan polymerase
All these condition causes ara operon to turn on EXCEPT
arabinose is bind to araC activator protein
arabinose is present
cAP-cAMP is present
loop is formed
