342932
Which of the following gene is not a structural gene in the lac operon?
1 Lac a
2 Lac i
3 Lac z
4 Lac y
Explanation:
Lac operon is a operon required for the transport and metabolism of lactose in E. coli and many other bacteria. Lac operon consists of one regulatory gene, common promoter, three structural genes and a operator. Structural genes are lac a, lac y and lac Z.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342933
Statement A : The operon is a unit of gene expression. Statement B : Regulation of lac operon by repressor is referred to as negative regulation.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both are correct
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342934
Inducible enzymes are
1 Usually involved in the anabolic pathways
2 Produced when an activator molecule enhances the attachment of RNA polymerase with the operator
3 Produced when a small molecule inactivates the repressor protein
4 Regulated by inherently inactive repressor
Explanation:
Inducible enzymes or an adaptive enzymes are the enzymes which are produced in response to a specific substrate, and produced only when required. It is also a part of the Operon model that demonstrates a technique for genes to go to turn "on" and "off" position. The gene is caused to turn on by the inducer and the repressor protein causes the gene to turn off. This repressor can be removed by the inducer, directing genes to back on.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342935
In an E.coli strain i gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?
1 z, y, a genes will be transcribed
2 z, y a genes will not be translated
3 RNA polymerase will bind the promoter region
4 Only z gene will get transcribed
Explanation:
In an E.coli strain I gene gets mutated and its product cannot bind the inducer molecule. If growth medium is provided with lactose then z, y, a genes will not be translated.
342932
Which of the following gene is not a structural gene in the lac operon?
1 Lac a
2 Lac i
3 Lac z
4 Lac y
Explanation:
Lac operon is a operon required for the transport and metabolism of lactose in E. coli and many other bacteria. Lac operon consists of one regulatory gene, common promoter, three structural genes and a operator. Structural genes are lac a, lac y and lac Z.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342933
Statement A : The operon is a unit of gene expression. Statement B : Regulation of lac operon by repressor is referred to as negative regulation.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both are correct
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342934
Inducible enzymes are
1 Usually involved in the anabolic pathways
2 Produced when an activator molecule enhances the attachment of RNA polymerase with the operator
3 Produced when a small molecule inactivates the repressor protein
4 Regulated by inherently inactive repressor
Explanation:
Inducible enzymes or an adaptive enzymes are the enzymes which are produced in response to a specific substrate, and produced only when required. It is also a part of the Operon model that demonstrates a technique for genes to go to turn "on" and "off" position. The gene is caused to turn on by the inducer and the repressor protein causes the gene to turn off. This repressor can be removed by the inducer, directing genes to back on.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342935
In an E.coli strain i gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?
1 z, y, a genes will be transcribed
2 z, y a genes will not be translated
3 RNA polymerase will bind the promoter region
4 Only z gene will get transcribed
Explanation:
In an E.coli strain I gene gets mutated and its product cannot bind the inducer molecule. If growth medium is provided with lactose then z, y, a genes will not be translated.
342932
Which of the following gene is not a structural gene in the lac operon?
1 Lac a
2 Lac i
3 Lac z
4 Lac y
Explanation:
Lac operon is a operon required for the transport and metabolism of lactose in E. coli and many other bacteria. Lac operon consists of one regulatory gene, common promoter, three structural genes and a operator. Structural genes are lac a, lac y and lac Z.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342933
Statement A : The operon is a unit of gene expression. Statement B : Regulation of lac operon by repressor is referred to as negative regulation.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both are correct
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342934
Inducible enzymes are
1 Usually involved in the anabolic pathways
2 Produced when an activator molecule enhances the attachment of RNA polymerase with the operator
3 Produced when a small molecule inactivates the repressor protein
4 Regulated by inherently inactive repressor
Explanation:
Inducible enzymes or an adaptive enzymes are the enzymes which are produced in response to a specific substrate, and produced only when required. It is also a part of the Operon model that demonstrates a technique for genes to go to turn "on" and "off" position. The gene is caused to turn on by the inducer and the repressor protein causes the gene to turn off. This repressor can be removed by the inducer, directing genes to back on.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342935
In an E.coli strain i gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?
1 z, y, a genes will be transcribed
2 z, y a genes will not be translated
3 RNA polymerase will bind the promoter region
4 Only z gene will get transcribed
Explanation:
In an E.coli strain I gene gets mutated and its product cannot bind the inducer molecule. If growth medium is provided with lactose then z, y, a genes will not be translated.
342932
Which of the following gene is not a structural gene in the lac operon?
1 Lac a
2 Lac i
3 Lac z
4 Lac y
Explanation:
Lac operon is a operon required for the transport and metabolism of lactose in E. coli and many other bacteria. Lac operon consists of one regulatory gene, common promoter, three structural genes and a operator. Structural genes are lac a, lac y and lac Z.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342933
Statement A : The operon is a unit of gene expression. Statement B : Regulation of lac operon by repressor is referred to as negative regulation.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both are correct
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342934
Inducible enzymes are
1 Usually involved in the anabolic pathways
2 Produced when an activator molecule enhances the attachment of RNA polymerase with the operator
3 Produced when a small molecule inactivates the repressor protein
4 Regulated by inherently inactive repressor
Explanation:
Inducible enzymes or an adaptive enzymes are the enzymes which are produced in response to a specific substrate, and produced only when required. It is also a part of the Operon model that demonstrates a technique for genes to go to turn "on" and "off" position. The gene is caused to turn on by the inducer and the repressor protein causes the gene to turn off. This repressor can be removed by the inducer, directing genes to back on.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342935
In an E.coli strain i gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?
1 z, y, a genes will be transcribed
2 z, y a genes will not be translated
3 RNA polymerase will bind the promoter region
4 Only z gene will get transcribed
Explanation:
In an E.coli strain I gene gets mutated and its product cannot bind the inducer molecule. If growth medium is provided with lactose then z, y, a genes will not be translated.
