Operons: Lac and Tryptophan Operons
When was concept of operon coined?
1961
1962
1963
1965
1961
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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
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
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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