Biotechnology and its Applications

Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells) :

1. An antifeedant
2. A toxic protein
3. Both sense and anti-sense RNA
4. A particular hormone

The first clinical gene therapy was given for treating

1. Rheumatoid arthritis
2. Adenosine deaminase deficiency
3. Diabetes mellitus
4. Chicken pox

A single strand of nucleic acid tagged with a radioactive molecule is called

1. Probe
2. Selectable marker
3. Vector
4. Plasmid

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

1. Flavr Savr tomato
2. Canola
3. Bt-brinjal
4. Golden rice

Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein:

1. is activated by acid pH of the foregut of the insect pest.
2. binds with epithelial cells of midgut of the insect pest ultimately killing it
3. is coded by several genes including the gene cry
4. does not kill the carrier bacterium which is itself resistant to this toxin

Silencing of mRNA has been used in producing transgenic plants resistant to:

1. White rusts
2. Nematodes
3. Bacterial blights
4. Bollworms

Maximum number of existing transgenic animals is of :

1. Mice
2. Cow
3. Pig
4. Fish

The process of RNA interference has been used in the development of plants resistant to :

1. Nematodes
2. Fungi
3. Viruses
4. Insects

Which one of the following is now being commercially produced by biotechnological procedures?

1. Insulin
2. Morphine
3. Nicotine
4. Quinine

DNA or RNA segment tagged with a radioactive molecule is called –

1. Clone
2. Probe
3. Plasmid
4. Vector