The genetic defect-Adenosine Deaminase (ADA) deficiency may be cured permanently by

(1) periodic infusion of genetically engineered lymphocytes having functional ADA cDNA 

(2) administering adenosine deaminase activators

(3) introducing bone marrow genes producing ADA into cells at early embryonic stages

(4) enzyme replacement therapy

Subtopic:  Gene Therapy |
 89%
From NCERT
NEET - 2009
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What is true about Bt toxin?

1. The inactive protoxin gets converted into active form in the insect gut

2. Bt protein exists as active toxin in the Bacillus

3. The activated toxin enters the ovaries of the pest to sterilize it and thus prevent its

multiplication

4. The concerned Bacillus has antitoxins

Subtopic:  Bt Crops |
 93%
From NCERT
NEET - 2009
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A transgenic food crop, which may help in solving the problem of night blindness in developing countries is:

1. Flavr savr tomatoes

2. Starlink maize

3. Bt soybean

4. Golden rice

Subtopic:  Intro to Agri Applications | Other GM Crops |
 86%
NEET - 2008
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Main objective of production / use of herbicide resistant GM crops is to 

(1) eliminate weeds from the field without the use of manual labour

(2) eliminate weeds from the field without the use of herbicides

(3) encourage eco-friendly herbicides

(4) reduce herbicide accumulation in food particles for health safety

Subtopic:  Intro to Agri Applications | Other GM Crops |
NEET - 2008
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Human insulin is being commercially produced from a transgenic species of

1. Escherichia

2. Mycobacterium

3. Rhizobium

4. Saccharomyces

Subtopic:  Med Applications & Humulin |
 89%
From NCERT
NEET - 2008
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Cry-I endotoxins obtained from Bacillus thuringiensis are effective against

(1) mosquitoes                         
(2) Nematodes
(3) boll worms                         
(4) Flies

Subtopic:  Bt Crops |
 85%
From NCERT
NEET - 2008
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What is an antisense technology?

(1) A cell displaying a foreign antigen used for synthesis of antigens.

(2) Production of somaclonal variants in tissue cultures.

(3) When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene

(4) RNA polymerase producing DNA

Subtopic:  Interference RNA Tech |
 89%
From NCERT
NEET - 2008
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The foreign gene in a transgenic plant may be derived from

(1) an insect 

(2) an animal

(3) a bacteria 

(4) all of these.

 

Subtopic:  Intro to Agri Applications |
 72%
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Cultivation of Bt cotton has been much in the news. The prefix Bt means

(1) "Barium-treated" cotton seeds

(2) "Bigger thread" variety of cotton with better tensile strength

(3) produced by "biotechnology" using restriction enzymes and ligases

(4) carrying an endotoxin gene from Bacillus thuringienesis.

Subtopic:  Bt Crops |
 95%
From NCERT
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An example of gene therapy is 

(1) production of injectable hepatitis B vaccine 

(2) production of vaccines in food crops like potatoes which can be eaten

(3) introduction of gene for adenosine deaminase in persons suffering from Severe Combined Immuno-deficiency (SCID)

(4) production of test tube babies by artificial insemination and implantation of fertilized eggs.

Subtopic:  Gene Therapy |
 93%
From NCERT
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