347661
Use of genetically modified crops in crop field may
1 Crops more tolerant to abiotic stresses
2 Maximise yield
3 Reduce post harvest losses.
4 All of the above
Explanation:
GM plants have been useful in many ways. Genetic modification has: (i) Made crops more tolerant to abiotic stresses (cold, drought, salt, heat). (ii) Reduced reliance on chemical pesticides (pest-resistant crops). (iii) Helped to reduce post harvest losses. (iv) maximise yield
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347662
Some of the characteristics of Bt cotton are
1 High yield and resistance to bollworms
2 High yield and production of toxic protein crystals which kill dipteran pests
3 Long fibre and resistance to beetle pests
4 Long fibre and resistance to aphids
Explanation:
Bt toxin genes were segregated from Bacillus thuringiensis and were included in cotton plant for forming genetically modified crop called Bt cotton. Bt cotton has high yield and \(\mathrm{Bt}\) toxins in it gives resistance against certain pest like Bollworm, corn borer.
AIPMT - 2010
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347663
Bt toxin is harmful to insects like?
1 Lepidopterans
2 Diptera
3 Coleopterans
4 All
Explanation:
Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes).
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347664
What is true about \(B t\) toxin?
1 The activated toxin enters the ovaries of the pest, sterilize it and thus, prevent its multiplication
2 The concerned bacillus has antitoxins
3 The inactive protoxin gets converted into active form in the insect gut
4 Bt protein exists as active toxin in the Bacillus
Explanation:
Cry gene of Bacillus thuringiensis produces \(B t\) proteins which form crystalline inclusion in bacteria spores. \(B t\) toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the alkaline \(\mathrm{pH}\) of the gut which solubilise the crystals. Activated toxin binds to the surface of midgut epithelial cells and creates pores that cause cell swelling and lysis and cause death of the insect
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347665
Which one of the following option is correct?
1 The proteins encoded by the genes cryIAc and cryIIAb control cotton bollworms
2 Protein encoded by cryIAb controls corn borer
3 Both (1) and (2)
4 Proteins encoded by cryIAc and cryIAb control flies
Explanation:
The toxin is coded by a gene cryIAc named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.
347661
Use of genetically modified crops in crop field may
1 Crops more tolerant to abiotic stresses
2 Maximise yield
3 Reduce post harvest losses.
4 All of the above
Explanation:
GM plants have been useful in many ways. Genetic modification has: (i) Made crops more tolerant to abiotic stresses (cold, drought, salt, heat). (ii) Reduced reliance on chemical pesticides (pest-resistant crops). (iii) Helped to reduce post harvest losses. (iv) maximise yield
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347662
Some of the characteristics of Bt cotton are
1 High yield and resistance to bollworms
2 High yield and production of toxic protein crystals which kill dipteran pests
3 Long fibre and resistance to beetle pests
4 Long fibre and resistance to aphids
Explanation:
Bt toxin genes were segregated from Bacillus thuringiensis and were included in cotton plant for forming genetically modified crop called Bt cotton. Bt cotton has high yield and \(\mathrm{Bt}\) toxins in it gives resistance against certain pest like Bollworm, corn borer.
AIPMT - 2010
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347663
Bt toxin is harmful to insects like?
1 Lepidopterans
2 Diptera
3 Coleopterans
4 All
Explanation:
Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes).
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347664
What is true about \(B t\) toxin?
1 The activated toxin enters the ovaries of the pest, sterilize it and thus, prevent its multiplication
2 The concerned bacillus has antitoxins
3 The inactive protoxin gets converted into active form in the insect gut
4 Bt protein exists as active toxin in the Bacillus
Explanation:
Cry gene of Bacillus thuringiensis produces \(B t\) proteins which form crystalline inclusion in bacteria spores. \(B t\) toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the alkaline \(\mathrm{pH}\) of the gut which solubilise the crystals. Activated toxin binds to the surface of midgut epithelial cells and creates pores that cause cell swelling and lysis and cause death of the insect
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347665
Which one of the following option is correct?
1 The proteins encoded by the genes cryIAc and cryIIAb control cotton bollworms
2 Protein encoded by cryIAb controls corn borer
3 Both (1) and (2)
4 Proteins encoded by cryIAc and cryIAb control flies
Explanation:
The toxin is coded by a gene cryIAc named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.
347661
Use of genetically modified crops in crop field may
1 Crops more tolerant to abiotic stresses
2 Maximise yield
3 Reduce post harvest losses.
4 All of the above
Explanation:
GM plants have been useful in many ways. Genetic modification has: (i) Made crops more tolerant to abiotic stresses (cold, drought, salt, heat). (ii) Reduced reliance on chemical pesticides (pest-resistant crops). (iii) Helped to reduce post harvest losses. (iv) maximise yield
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347662
Some of the characteristics of Bt cotton are
1 High yield and resistance to bollworms
2 High yield and production of toxic protein crystals which kill dipteran pests
3 Long fibre and resistance to beetle pests
4 Long fibre and resistance to aphids
Explanation:
Bt toxin genes were segregated from Bacillus thuringiensis and were included in cotton plant for forming genetically modified crop called Bt cotton. Bt cotton has high yield and \(\mathrm{Bt}\) toxins in it gives resistance against certain pest like Bollworm, corn borer.
AIPMT - 2010
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347663
Bt toxin is harmful to insects like?
1 Lepidopterans
2 Diptera
3 Coleopterans
4 All
Explanation:
Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes).
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347664
What is true about \(B t\) toxin?
1 The activated toxin enters the ovaries of the pest, sterilize it and thus, prevent its multiplication
2 The concerned bacillus has antitoxins
3 The inactive protoxin gets converted into active form in the insect gut
4 Bt protein exists as active toxin in the Bacillus
Explanation:
Cry gene of Bacillus thuringiensis produces \(B t\) proteins which form crystalline inclusion in bacteria spores. \(B t\) toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the alkaline \(\mathrm{pH}\) of the gut which solubilise the crystals. Activated toxin binds to the surface of midgut epithelial cells and creates pores that cause cell swelling and lysis and cause death of the insect
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347665
Which one of the following option is correct?
1 The proteins encoded by the genes cryIAc and cryIIAb control cotton bollworms
2 Protein encoded by cryIAb controls corn borer
3 Both (1) and (2)
4 Proteins encoded by cryIAc and cryIAb control flies
Explanation:
The toxin is coded by a gene cryIAc named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.
347661
Use of genetically modified crops in crop field may
1 Crops more tolerant to abiotic stresses
2 Maximise yield
3 Reduce post harvest losses.
4 All of the above
Explanation:
GM plants have been useful in many ways. Genetic modification has: (i) Made crops more tolerant to abiotic stresses (cold, drought, salt, heat). (ii) Reduced reliance on chemical pesticides (pest-resistant crops). (iii) Helped to reduce post harvest losses. (iv) maximise yield
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347662
Some of the characteristics of Bt cotton are
1 High yield and resistance to bollworms
2 High yield and production of toxic protein crystals which kill dipteran pests
3 Long fibre and resistance to beetle pests
4 Long fibre and resistance to aphids
Explanation:
Bt toxin genes were segregated from Bacillus thuringiensis and were included in cotton plant for forming genetically modified crop called Bt cotton. Bt cotton has high yield and \(\mathrm{Bt}\) toxins in it gives resistance against certain pest like Bollworm, corn borer.
AIPMT - 2010
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347663
Bt toxin is harmful to insects like?
1 Lepidopterans
2 Diptera
3 Coleopterans
4 All
Explanation:
Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes).
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347664
What is true about \(B t\) toxin?
1 The activated toxin enters the ovaries of the pest, sterilize it and thus, prevent its multiplication
2 The concerned bacillus has antitoxins
3 The inactive protoxin gets converted into active form in the insect gut
4 Bt protein exists as active toxin in the Bacillus
Explanation:
Cry gene of Bacillus thuringiensis produces \(B t\) proteins which form crystalline inclusion in bacteria spores. \(B t\) toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the alkaline \(\mathrm{pH}\) of the gut which solubilise the crystals. Activated toxin binds to the surface of midgut epithelial cells and creates pores that cause cell swelling and lysis and cause death of the insect
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347665
Which one of the following option is correct?
1 The proteins encoded by the genes cryIAc and cryIIAb control cotton bollworms
2 Protein encoded by cryIAb controls corn borer
3 Both (1) and (2)
4 Proteins encoded by cryIAc and cryIAb control flies
Explanation:
The toxin is coded by a gene cryIAc named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.
347661
Use of genetically modified crops in crop field may
1 Crops more tolerant to abiotic stresses
2 Maximise yield
3 Reduce post harvest losses.
4 All of the above
Explanation:
GM plants have been useful in many ways. Genetic modification has: (i) Made crops more tolerant to abiotic stresses (cold, drought, salt, heat). (ii) Reduced reliance on chemical pesticides (pest-resistant crops). (iii) Helped to reduce post harvest losses. (iv) maximise yield
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347662
Some of the characteristics of Bt cotton are
1 High yield and resistance to bollworms
2 High yield and production of toxic protein crystals which kill dipteran pests
3 Long fibre and resistance to beetle pests
4 Long fibre and resistance to aphids
Explanation:
Bt toxin genes were segregated from Bacillus thuringiensis and were included in cotton plant for forming genetically modified crop called Bt cotton. Bt cotton has high yield and \(\mathrm{Bt}\) toxins in it gives resistance against certain pest like Bollworm, corn borer.
AIPMT - 2010
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347663
Bt toxin is harmful to insects like?
1 Lepidopterans
2 Diptera
3 Coleopterans
4 All
Explanation:
Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes).
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347664
What is true about \(B t\) toxin?
1 The activated toxin enters the ovaries of the pest, sterilize it and thus, prevent its multiplication
2 The concerned bacillus has antitoxins
3 The inactive protoxin gets converted into active form in the insect gut
4 Bt protein exists as active toxin in the Bacillus
Explanation:
Cry gene of Bacillus thuringiensis produces \(B t\) proteins which form crystalline inclusion in bacteria spores. \(B t\) toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the alkaline \(\mathrm{pH}\) of the gut which solubilise the crystals. Activated toxin binds to the surface of midgut epithelial cells and creates pores that cause cell swelling and lysis and cause death of the insect
AIPMT - 2009
BIOXII12: BIOTECHNOLOGY AND ITS APPLICATIONS
347665
Which one of the following option is correct?
1 The proteins encoded by the genes cryIAc and cryIIAb control cotton bollworms
2 Protein encoded by cryIAb controls corn borer
3 Both (1) and (2)
4 Proteins encoded by cryIAc and cryIAb control flies
Explanation:
The toxin is coded by a gene cryIAc named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.
