Q. No.Golden rice is a transgenic crop of the future with the following improved trait:
1. High protein content
2. High vitamin – A content
3. High lysine (essential amino acid) content
4. Insect resistance
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
| 1. | Flavr savr tomatoes |
| 2. | Starlink maize |
| 3. | Bt soybean |
| 4. | Golden rice |
The bacterium Bacillus thuringiensis is widely used in contemporary biology as a/an:
1. indicator of water pollution
2. insecticide
3. agent for production of dairy products
4. source of industrial enzyme
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 |
Transgenic plants are:
| 1. | produced by a somatic embryo in artificial medium |
| 2. | generated by introducing foreign DNA into a cell and regenerating a plant from that cell |
| 3. | Produced after protoplast fusion in artificial medium |
| 4. | grown in artificial medium after hybridization in the field |
An improved variety of transgenic basmati rice:
| 1. | does not require chemical fertilizers and growth hormones |
| 2. | gives high yield and is rich in vitamin-A |
| 3. | is completely resistant to all insect pests and diseases of paddy |
| 4. | gives high yield but has no characteristic aroma |
Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein:
| 1. | does not kill the carrier bacterium which is itself resistant to this toxin |
| 2. | binds with epithelial cells of the midgut of the insect pest ultimately killing it |
| 3. | is coded by several genes including the gene cry. |
| 4. | is activated by acid pH of the foregut of the insect pest. |
Bt cotton is not
1. a GM plant
2. insect resistant
3. a bacterial gene expressing system
4. resistant to all pesticides
A protoxin is
1. a primitive toxin
2. a denatured toxin
3. toxin produced by Protozoa
4. inactive toxin
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