Q. Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells) : 1. A particular hormone 2. An antifeedant 3. A toxic protein 4. Both sense and anti-sense RNA NEET 2012

 Q.
Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells) :
1.  A particular hormone
2.  An antifeedant
3.  A toxic protein
4.  Both sense and anti-sense RNA

NEET 2012

Ans: 4.
  Both sense and anti-sense RNA

Nematode specific gene is introduced in host plant (tobacco), by using Ti plasmid (vector) of Agrobacterium tumefaciens. in such a manner that it produces both sense and antisense RNAin the host cells. 

Topic: PEST RESISTANT PLANTS