Role of Bt Bacterium as Biocontrol Agent

Q.

Bacillus thuringiensis (Bt) strains have been used for designing novel

1. Bio metallurgical technique

2. Bio mineralisation processes

3. Bio insecticidal plants

4. Bio fertilisers

Q. The 't' of Bt in Bt cotton stands for .

1. technology
2. test
3. thuringiensis
4. temperis

Q. Bt toxin protects the cotton plants against insect pests by causing

1. serious damage to the circulatory system of the insect
2. paralysis and loss of movement in the appendages of the insect
3. swelling and lysis of midgut of the insect
4. swelling of the entire body

Q. What is not correct about Bacillus thuringiensis?

1. It can be sprayed on plants
2. It can kill harmful bacteria
3. It can kill insects
4. Its toxin has been genetically engineered

Q. Trichoderma species are free living and are effective biocontrol agents of several plant pathogens. They are:

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