347644
Assertion : A crop expressing a cry gene is usually resistant to a group of insects. Reason : Cry proteins produced from Bacillus thuringiensis is non toxic to the bacillus
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Bacillus thuringiensis (Bt), a soil bacterium produces a Cry protein (crystal protein). This protein is toxic to the larvae of certain insects. There are several kinds of Cry proteins. Each Cry protein is toxic to a different group of insects. The gene encoding Cry protein, i.e., cry gene has been isolated and transferred into several crops. A crop expressing a cry gens is usually resistant to the groups of insects.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347645
The bacterium Bacillus thuringiensis is widely used in contemporary biology as a
1 Insecticide
2 Indicator of water pollution
3 Agent for production of diary products
4 Source of industrial enzyme
Explanation:
The bacterium Bacilius thuringiensis or \(\mathrm{Bt}\) is a gram positive bacteria of the genus Bacillus residing in soil. It generates a parasporal insecticidal crystal protein. Thus, Bt is used as an insecticide in contemporary biology.
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347646
Statement A : Bacillus tumefaciens is popularly used in genetic engineering because it can deliver genes to dicots Statement B : Using Agrobacterium as vector, the genes can be transferred in biotechnological techniques.
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:
Agrobarcterium is well known for its ability to transfer DNA between itself and plants, and for this reason it has become an important tool for genetic engineering. Agrobacterium tumefaciens is a plant pathogen and most effective as plant genetic engineer. It causes the formation of crown gall in plants. The tumor-inducing plasmid Ti can be used as a useful cloning vector in gene cloning in plants. It introduces a piece of DNA which transforms normal plant cells into tumor cells. The Ti plasmid contains genes for the synthesis of auxin and cytokinin hormone and thus its introduction in a plant helps it to produce its own nutrient machinery. Statement-B is correct.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347647
Identify the correct statements
1 Bt-toxins are insect-group specific
2 Proteins encoded by gene CryIAb controls cotton boll worms
3 CryIAc & CryIIAb genes encode proteins that control corn borers
4 Bt-toxin genes cannot be introduced in food crops
Explanation:
All insects cannot be controlled by Btgene. Hence group specific.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347648
Organic agriculture is a technique of raising crops for
1 Increased food production
2 Reduced use of chemical based fertilisers and pesticides
3 Increasing the use of agrochemicals
4 None of the above
Explanation:
Organic agriculture is the technique of raising crops, which is aimed at reducing the need for chemical fertilisers and pesticides, which are harmful to both mankind and environment. Food production in organic agriculture is compatatively low as compared to other methods, which include the use of pesticides and herbicides.
347644
Assertion : A crop expressing a cry gene is usually resistant to a group of insects. Reason : Cry proteins produced from Bacillus thuringiensis is non toxic to the bacillus
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Bacillus thuringiensis (Bt), a soil bacterium produces a Cry protein (crystal protein). This protein is toxic to the larvae of certain insects. There are several kinds of Cry proteins. Each Cry protein is toxic to a different group of insects. The gene encoding Cry protein, i.e., cry gene has been isolated and transferred into several crops. A crop expressing a cry gens is usually resistant to the groups of insects.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347645
The bacterium Bacillus thuringiensis is widely used in contemporary biology as a
1 Insecticide
2 Indicator of water pollution
3 Agent for production of diary products
4 Source of industrial enzyme
Explanation:
The bacterium Bacilius thuringiensis or \(\mathrm{Bt}\) is a gram positive bacteria of the genus Bacillus residing in soil. It generates a parasporal insecticidal crystal protein. Thus, Bt is used as an insecticide in contemporary biology.
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347646
Statement A : Bacillus tumefaciens is popularly used in genetic engineering because it can deliver genes to dicots Statement B : Using Agrobacterium as vector, the genes can be transferred in biotechnological techniques.
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:
Agrobarcterium is well known for its ability to transfer DNA between itself and plants, and for this reason it has become an important tool for genetic engineering. Agrobacterium tumefaciens is a plant pathogen and most effective as plant genetic engineer. It causes the formation of crown gall in plants. The tumor-inducing plasmid Ti can be used as a useful cloning vector in gene cloning in plants. It introduces a piece of DNA which transforms normal plant cells into tumor cells. The Ti plasmid contains genes for the synthesis of auxin and cytokinin hormone and thus its introduction in a plant helps it to produce its own nutrient machinery. Statement-B is correct.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347647
Identify the correct statements
1 Bt-toxins are insect-group specific
2 Proteins encoded by gene CryIAb controls cotton boll worms
3 CryIAc & CryIIAb genes encode proteins that control corn borers
4 Bt-toxin genes cannot be introduced in food crops
Explanation:
All insects cannot be controlled by Btgene. Hence group specific.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347648
Organic agriculture is a technique of raising crops for
1 Increased food production
2 Reduced use of chemical based fertilisers and pesticides
3 Increasing the use of agrochemicals
4 None of the above
Explanation:
Organic agriculture is the technique of raising crops, which is aimed at reducing the need for chemical fertilisers and pesticides, which are harmful to both mankind and environment. Food production in organic agriculture is compatatively low as compared to other methods, which include the use of pesticides and herbicides.
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BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347644
Assertion : A crop expressing a cry gene is usually resistant to a group of insects. Reason : Cry proteins produced from Bacillus thuringiensis is non toxic to the bacillus
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Bacillus thuringiensis (Bt), a soil bacterium produces a Cry protein (crystal protein). This protein is toxic to the larvae of certain insects. There are several kinds of Cry proteins. Each Cry protein is toxic to a different group of insects. The gene encoding Cry protein, i.e., cry gene has been isolated and transferred into several crops. A crop expressing a cry gens is usually resistant to the groups of insects.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347645
The bacterium Bacillus thuringiensis is widely used in contemporary biology as a
1 Insecticide
2 Indicator of water pollution
3 Agent for production of diary products
4 Source of industrial enzyme
Explanation:
The bacterium Bacilius thuringiensis or \(\mathrm{Bt}\) is a gram positive bacteria of the genus Bacillus residing in soil. It generates a parasporal insecticidal crystal protein. Thus, Bt is used as an insecticide in contemporary biology.
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347646
Statement A : Bacillus tumefaciens is popularly used in genetic engineering because it can deliver genes to dicots Statement B : Using Agrobacterium as vector, the genes can be transferred in biotechnological techniques.
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:
Agrobarcterium is well known for its ability to transfer DNA between itself and plants, and for this reason it has become an important tool for genetic engineering. Agrobacterium tumefaciens is a plant pathogen and most effective as plant genetic engineer. It causes the formation of crown gall in plants. The tumor-inducing plasmid Ti can be used as a useful cloning vector in gene cloning in plants. It introduces a piece of DNA which transforms normal plant cells into tumor cells. The Ti plasmid contains genes for the synthesis of auxin and cytokinin hormone and thus its introduction in a plant helps it to produce its own nutrient machinery. Statement-B is correct.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347647
Identify the correct statements
1 Bt-toxins are insect-group specific
2 Proteins encoded by gene CryIAb controls cotton boll worms
3 CryIAc & CryIIAb genes encode proteins that control corn borers
4 Bt-toxin genes cannot be introduced in food crops
Explanation:
All insects cannot be controlled by Btgene. Hence group specific.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347648
Organic agriculture is a technique of raising crops for
1 Increased food production
2 Reduced use of chemical based fertilisers and pesticides
3 Increasing the use of agrochemicals
4 None of the above
Explanation:
Organic agriculture is the technique of raising crops, which is aimed at reducing the need for chemical fertilisers and pesticides, which are harmful to both mankind and environment. Food production in organic agriculture is compatatively low as compared to other methods, which include the use of pesticides and herbicides.
347644
Assertion : A crop expressing a cry gene is usually resistant to a group of insects. Reason : Cry proteins produced from Bacillus thuringiensis is non toxic to the bacillus
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Bacillus thuringiensis (Bt), a soil bacterium produces a Cry protein (crystal protein). This protein is toxic to the larvae of certain insects. There are several kinds of Cry proteins. Each Cry protein is toxic to a different group of insects. The gene encoding Cry protein, i.e., cry gene has been isolated and transferred into several crops. A crop expressing a cry gens is usually resistant to the groups of insects.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347645
The bacterium Bacillus thuringiensis is widely used in contemporary biology as a
1 Insecticide
2 Indicator of water pollution
3 Agent for production of diary products
4 Source of industrial enzyme
Explanation:
The bacterium Bacilius thuringiensis or \(\mathrm{Bt}\) is a gram positive bacteria of the genus Bacillus residing in soil. It generates a parasporal insecticidal crystal protein. Thus, Bt is used as an insecticide in contemporary biology.
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347646
Statement A : Bacillus tumefaciens is popularly used in genetic engineering because it can deliver genes to dicots Statement B : Using Agrobacterium as vector, the genes can be transferred in biotechnological techniques.
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:
Agrobarcterium is well known for its ability to transfer DNA between itself and plants, and for this reason it has become an important tool for genetic engineering. Agrobacterium tumefaciens is a plant pathogen and most effective as plant genetic engineer. It causes the formation of crown gall in plants. The tumor-inducing plasmid Ti can be used as a useful cloning vector in gene cloning in plants. It introduces a piece of DNA which transforms normal plant cells into tumor cells. The Ti plasmid contains genes for the synthesis of auxin and cytokinin hormone and thus its introduction in a plant helps it to produce its own nutrient machinery. Statement-B is correct.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347647
Identify the correct statements
1 Bt-toxins are insect-group specific
2 Proteins encoded by gene CryIAb controls cotton boll worms
3 CryIAc & CryIIAb genes encode proteins that control corn borers
4 Bt-toxin genes cannot be introduced in food crops
Explanation:
All insects cannot be controlled by Btgene. Hence group specific.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347648
Organic agriculture is a technique of raising crops for
1 Increased food production
2 Reduced use of chemical based fertilisers and pesticides
3 Increasing the use of agrochemicals
4 None of the above
Explanation:
Organic agriculture is the technique of raising crops, which is aimed at reducing the need for chemical fertilisers and pesticides, which are harmful to both mankind and environment. Food production in organic agriculture is compatatively low as compared to other methods, which include the use of pesticides and herbicides.
347644
Assertion : A crop expressing a cry gene is usually resistant to a group of insects. Reason : Cry proteins produced from Bacillus thuringiensis is non toxic to the bacillus
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Bacillus thuringiensis (Bt), a soil bacterium produces a Cry protein (crystal protein). This protein is toxic to the larvae of certain insects. There are several kinds of Cry proteins. Each Cry protein is toxic to a different group of insects. The gene encoding Cry protein, i.e., cry gene has been isolated and transferred into several crops. A crop expressing a cry gens is usually resistant to the groups of insects.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347645
The bacterium Bacillus thuringiensis is widely used in contemporary biology as a
1 Insecticide
2 Indicator of water pollution
3 Agent for production of diary products
4 Source of industrial enzyme
Explanation:
The bacterium Bacilius thuringiensis or \(\mathrm{Bt}\) is a gram positive bacteria of the genus Bacillus residing in soil. It generates a parasporal insecticidal crystal protein. Thus, Bt is used as an insecticide in contemporary biology.
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347646
Statement A : Bacillus tumefaciens is popularly used in genetic engineering because it can deliver genes to dicots Statement B : Using Agrobacterium as vector, the genes can be transferred in biotechnological techniques.
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:
Agrobarcterium is well known for its ability to transfer DNA between itself and plants, and for this reason it has become an important tool for genetic engineering. Agrobacterium tumefaciens is a plant pathogen and most effective as plant genetic engineer. It causes the formation of crown gall in plants. The tumor-inducing plasmid Ti can be used as a useful cloning vector in gene cloning in plants. It introduces a piece of DNA which transforms normal plant cells into tumor cells. The Ti plasmid contains genes for the synthesis of auxin and cytokinin hormone and thus its introduction in a plant helps it to produce its own nutrient machinery. Statement-B is correct.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347647
Identify the correct statements
1 Bt-toxins are insect-group specific
2 Proteins encoded by gene CryIAb controls cotton boll worms
3 CryIAc & CryIIAb genes encode proteins that control corn borers
4 Bt-toxin genes cannot be introduced in food crops
Explanation:
All insects cannot be controlled by Btgene. Hence group specific.
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347648
Organic agriculture is a technique of raising crops for
1 Increased food production
2 Reduced use of chemical based fertilisers and pesticides
3 Increasing the use of agrochemicals
4 None of the above
Explanation:
Organic agriculture is the technique of raising crops, which is aimed at reducing the need for chemical fertilisers and pesticides, which are harmful to both mankind and environment. Food production in organic agriculture is compatatively low as compared to other methods, which include the use of pesticides and herbicides.