Operons: Lac and Tryptophan Operons
Tetrameric regulatory protein of lac operon has molecular weight nearly:
130000
150000
140000
110000
150000
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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
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
Messenger RNA that code for one or more protein is called:
A. Polycistronic messenger Ribonucleic Acid (RNA)
B. Messenger Ribonucleic Acid (RNA)
C. Transfer Ribonucleic Acid (RNA)
D. Cytoplasmic Ribonucleic Acid (RNA)
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