Q9 of 57 Page 86

What is meant by the term bio-pesticide? Name and explain the mode of action of a popular bio-pesticide.

- Bio-pesticides are the biologically present substances which are used to control the pests.


- These are narrow spectrum & species specific.


- e.g. – Bt toxin


- Bt toxin obtained from Bacillus thuringiensis is used against the insects.


- The insects when ingest Bt toxin, due to presence of alkaline nature Bt toxin gets activate, binds to the gut wall, creates pores hence the insects die.


More from this chapter

All 57 →
6

Explain with the help of one example how genetically modified plants can:

(a) Reduce usage of chemical pesticides


(b) Enhance nutritional value of food crops


 7

List the disadvantages of insulin obtained from the pancreas of slaughtered cows and pigs:

 8

List the advantages of recombinant insulin.

 10

Name the five key tools for accomplishing the tasks of recombinant DNA technology. Also mention the functions of each tool.