Operons: Lac and Tryptophan Operons
Structural gene Z in lac operon code for enzyme known as:
Galactose permease
Galactoside acetylase
galactosidase
Amylase
galactosidase
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Lac operon included:A. Operator gene
B. Structural gene
C. Promoter site
D. all of above
A group of gene transcribed or code for production of tryptophan known as:
A. Lac operon
B. Tryptophan operon
C. Promotor
D. Operator
When was concept of operon coined?
A. 1961
B. 1962
C. 1963
D. 1965
In E. coli regulation of lactose metabolism is known as:
A. Tryptophan operon
B. Lac operon
C. Operon
D. none of above
Tetrameric regulatory protein of lac operon has molecular weight nearly:
A. 130000
B. 150000
C. 140000
D. 110000
Structural gene A in lac operon code for enzyme known as:
A. Galactose permease
B. Galactoside acetylase
C. galactosidase
D. Amylase
Negative regulator of gene expression is called:
A. Operator
B. Promotor
C. Repressor
D. Constitutive gene
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