Advertisements
Advertisements
प्रश्न
How did the process of RNA interference help to control the nematode from infecting the roots of tobacco plants?
उत्तर
RNA Interference (RNAi) is a gene-silencing process that blocks the expression of genes in the parasite when it enters the host's body.
-
RNAi is a method adopted to prevent infestation of roots of tobacco plants by a nematode Meloidegyne incognitia.
-
In RNAi, a complementary RNA binds to mRNA to form a ds RNA that cannot translate and hence, its expression is blocked (Silencing).
-
In this process, nematode-specific genes (DNA) are introduced in the host plant.
-
This introduced DNA forms both sense and anti-sense RNA.
-
These two strands, being complementary to each other, bend and form ds RNA, leading to RNA interference.
-
mRNA of nematode is thus silenced and the parasite cannot survive in the transgenic host.
Thus, through the above method, tobacco plants can be protected from nematode attack
APPEARS IN
संबंधित प्रश्न
What happens when Meloidegyne incognitia consumes cells with RNAi gene?
Organic farmers prefer biological control of diseases and pests to the use of chemicals for the same purpose. Justify.
Answer the following question.
Write the desirable characters a farmer looks for in his sugarcane crop.
GM crops especially Bt crops are known to have higher resistance to pest attacks. To substantiate this an experimental study was conducted in 4 different farmlands growing Bt and non Bt-Cotton crops. The farm lands had the same dimensions, fertility and were under similar climatic conditions. The histogram below shows the usage of pesticides on Bt crops and non-Bt crops in these farm lands.
- Which of the above 4 farm lands has successfully applied the concepts of Biotechnology to show better management practices and use of agrochemicals? If you had to cultivate, which crop would you prefer (Bt or Non- Bt) and why?
- Cotton Bollworms were introduced in another experimental study on the above farm lands wherein no pesticide was used. Explain what effect would a Bt and Non Bt crop have on the pest.
Golden Rice:
A. GM rice
B. Rich in Vit A
C. Prevents blindness
D. Bruise resistant
Bt cotton is resistant to pest, such as lepidopteron, dipterans and coleopterans. Is Bt cotton also resistant to other pests as well?
What are the various advantages of using genetically modified plants to increase the overall yield of the crop?
Explain with the help of one example how genetically modified plants can:
- Reduce usage of chemical pesticides
- Enhance nutritional value of food crops
With the help of a suitable example, explain how cry-proteins acts as a biological pesticide.
State any two benefits of Genetically modified crops.
