Microbes found to be very useful in genetic engineering are:

1.	Escherichia coli and Agrobacterium tumefaciens
2.	Vibrio cholerae and a tailed bacteriophage
3.	Diplococcus sp. and Pseudomonas sp.
4.	Crown gall bacterium and caenorhabditis elegans

Which of the following is true for Golden rice?

Golden rice is a promising transgenic crop. When released for cultivation, it will help in:

1. alleviation of vitamin-A deficiency

2. pest resistance

3. herbicide tolerance

4. producing a petrol-like fuel from rice

Transgenic plants are:

Which one of the following is commonly used in the transfer of foreign DNA into crop plants?

1. Trichoderma harzianum

2. Meloidogyne incognita

3. Agro bacterium tumefaciens

4. Penicillium expansum

Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin-A deficiency?

Why does Bt toxin not kill Bacillus thuringiensis?
1. The bacillus keeps proteins in inclusions
2. The toxin exists in the bacillus as a pro-toxin
3. The bacillus protects its genetic material by methylation
4. The bacillus has a tough cell wall of peptidoglycan

Cotton plants can be protected from corn borer by the proteins coded by:
1. cryIAc                       
2. cryIIAb
3. cryIAb                       
4. cryIAd

RNAi, as a mechanism of cellular defense, takes place in:
1. All bacteria

2. All unicellular organisms

3. All plants only

4. All eukaryotic organisms

How were nematode-specific genes introduced in tobacco plants?

1. Using page DNA

2. Using a retrovirus

3. By gene gun

4. Using Agrobacterium tumefaciens