Case Based Questions Test: Biotechnology & Its Applications - NEET MCQ

Biotechnology can be defined as the use of biological processes in industry and technology. During the past three decades biotechnology has gained attention due to the gene cloning process. Biotechnological applications are playing an important role in agriculture. They are used in agro-chemical based agriculture, in organic farming, genetically

engineered crop-based agriculture. The green revolution is the milestone or result of these biotechnological processes.

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Bt toxin is crystals contain insecticidal

protein.

Reason (R) : B. thuringiensis forms these protein crystals continuously during their growth period.

Biotechnology can be defined as the use of biological processes in industry and technology. During the past three decades biotechnology has gained attention due to the gene cloning process. Biotechnological applications are playing an important role in agriculture. They are used in agro-chemical based agriculture, in organic farming, genetically

engineered crop-based agriculture. The green revolution is the milestone or result of these biotechnological processes.

Q. When does ‘Bt’ in BT toxin represent ?

Read the following text and answer the following question on the basis of the same: Transgenic animals have their DNA manipulated to possess and express an extra gene. The genome of these animals has been changed and they can carry genes from other species. The first transgenic sheep was Tracy. The reason behind producing these transgenic animals are for specific economic traits, some are produced as disease models (animals genetically manipulated to exhibit disease symptoms so that effective treatment can be studied).

Q. ___ were the first mammals to be transgenic animals.

Read the following text and answer the following question on the basis of the same: Transgenic animals have their DNA manipulated to possess and express an extra gene. The genome of these animals has been changed and they can carry genes from other species. The first transgenic sheep was Tracy. The reason behind producing these transgenic animals are for specific economic traits, some are produced as disease models (animals genetically manipulated to exhibit disease symptoms so that effective treatment can be studied).

Q. The 1^st transgenic cow is :

Read the following text and answer the following question on the basis of the same: Transgenic animals have their DNA manipulated to possess and express an extra gene. The genome of these animals has been changed and they can carry genes from other species. The first transgenic sheep was Tracy. The reason behind producing these transgenic animals are for specific economic traits, some are produced as disease models (animals genetically manipulated to exhibit disease symptoms so that effective treatment can be studied).

Q. 95% transgenic animals are :

Read the following text and answer the following question on the basis of the same: Transgenic animals have their DNA manipulated to possess and express an extra gene. The genome of these animals has been changed and they can carry genes from other species. The first transgenic sheep was Tracy. The reason behind producing these transgenic animals are for specific economic traits, some are produced as disease models (animals genetically manipulated to exhibit disease symptoms so that effective treatment can be studied).

Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion (A) : Dolly, was the first mammal to be cloned from an udder cell.

Reason (R) : To create, Dolly the Finn Dorset ewe, Ian Wilmut and Keith Campbell used aid from three mothers.

Read the following text and answer the following question on the basis of the same: Transgenic animals have their DNA manipulated to possess and express an extra gene. The genome of these animals has been changed and they can carry genes from other species. The first transgenic sheep was Tracy. The reason behind producing these transgenic animals are for specific economic traits, some are produced as disease models (animals genetically manipulated to exhibit disease symptoms so that effective treatment can be studied).

Q. 1st cloned animals is :

Read the following and answer the question given below:

Plants having foreign genes in their genome through genetic engineering are called transgenic plants. Genes can be incorporated either through a vector or through direct introduction of DNA. Bt cotton is a genetically modified organism which is pest resistant. It contains gene cry I Ac and cry II Ab of Bacillus thuringiensis. It is used to control lepidopterans, coleopterans and dipterans. Bt cotton can resist cotton bollworm and produce higher yields. Cry genes produce cry protein or Bt toxin. It is an endotoxin which remains as protoxin in plants and converted to active toxin after getting ingested by the insects. Alkaline pH of the insect gut solubilizes the protein crystals, the activated toxin creates pores to the midgut wall of the insects which cause them to die.

Q. What is true about Bt cotton crops?

Read the following and answer the question given below:

Plants having foreign genes in their genome through genetic engineering are called transgenic plants. Genes can be incorporated either through a vector or through direct introduction of DNA. Bt cotton is a genetically modified organism which is pest resistant. It contains gene cry I Ac and cry II Ab of Bacillus thuringiensis. It is used to control lepidopterans, coleopterans and dipterans. Bt cotton can resist cotton bollworm and produce higher yields. Cry genes produce cry protein or Bt toxin. It is an endotoxin which remains as protoxin in plants and converted to active toxin after getting ingested by the insects. Alkaline pH of the insect gut solubilizes the protein crystals, the activated toxin creates pores to the midgut wall of the insects which cause them to die.

Q. Bacillus thuringiensis is a

Read the following and answer the question given below:

Plants having foreign genes in their genome through genetic engineering are called transgenic plants. Genes can be incorporated either through a vector or through direct introduction of DNA. Bt cotton is a genetically modified organism which is pest resistant. It contains gene cry I Ac and cry II Ab of Bacillus thuringiensis. It is used to control lepidopterans, coleopterans and dipterans. Bt cotton can resist cotton bollworm and produce higher yields. Cry genes produce cry protein or Bt toxin. It is an endotoxin which remains as protoxin in plants and converted to active toxin after getting ingested by the insects. Alkaline pH of the insect gut solubilizes the protein crystals, the activated toxin creates pores to the midgut wall of the insects which cause them to die.

Q. Cotton bollworms are killed by the protein encoded by the gene

Read the following and answer the question given below:

Plants having foreign genes in their genome through genetic engineering are called transgenic plants. Genes can be incorporated either through a vector or through direct introduction of DNA. Bt cotton is a genetically modified organism which is pest resistant. It contains gene cry I Ac and cry II Ab of Bacillus thuringiensis. It is used to control lepidopterans, coleopterans and dipterans. Bt cotton can resist cotton bollworm and produce higher yields. Cry genes produce cry protein or Bt toxin. It is an endotoxin which remains as protoxin in plants and converted to active toxin after getting ingested by the insects. Alkaline pH of the insect gut solubilizes the protein crystals, the activated toxin creates pores to the midgut wall of the insects which cause them to die.

Q. Some strains of Bacillus thuringiensis can kill certain insects such as _______

Read the following and answer the question given below:

Plants having foreign genes in their genome through genetic engineering are called transgenic plants. Genes can be incorporated either through a vector or through direct introduction of DNA. Bt cotton is a genetically modified organism which is pest resistant. It contains gene cry I Ac and cry II Ab of Bacillus thuringiensis. It is used to control lepidopterans, coleopterans and dipterans. Bt cotton can resist cotton bollworm and produce higher yields. Cry genes produce cry protein or Bt toxin. It is an endotoxin which remains as protoxin in plants and converted to active toxin after getting ingested by the insects. Alkaline pH of the insect gut solubilizes the protein crystals, the activated toxin creates pores to the midgut wall of the insects which cause them to die.

Q. Identify which of the following is not an advantage of GM crops?