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

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

Cry-I endotoxins obtained from Bacillus thuringiensis are effective against

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

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

The foreign gene in a transgenic plant may be derived from

(1) an insect 

(2) an animal

(3) a bacteria 

(4) all of these.

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.

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.

Which onc of the following is a correct statement?
(1) "B" in "Bt-cotton" indicates that it is a genetically modified organism produced through biotechnology

(2) Somatic hybridization involves fusion of two complete plant cells carrying desired genes.

(3) The anticoagulant hirudin is being produced from transgenic Brassica napus seeds.

(4) "Flavr Savr" variety of tomato has enhan the production of ethylene which improves its taste.

In transgenics, expression of transgene in target tissue is determined by

(1) enhancer

(2) transgene

(3) promoter

(4) reporter

Eugenics is the branch concerned with

(1) improving the quality of human race by symptomatic treatment of genetic diseases.

(2) improving the quality of human populations by the application of genetic principles.

(3) improving the quality of human race by providing best suitable environment.

(4) none of the above.