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प्रश्न
How has man exploited cry proteins to his benefit?
उत्तर
Two cry genes are inserted into cotton (Bt cotton), while one is inserted into corn (Bt corn). The resulting Bt cotton becomes resistant to bollworms, while Bt corn develops resistance to corn borer.
संबंधित प्रश्न
How did the process of RNA interference help to control the nematode from infecting the roots of tobacco plants?
What is the major advantage of producing plants by micropropagation?
Explain the term biofortification. How is this technique useful for the production of ‘ golden rice?
Answer the following question:
Why do farmers find the production of hybrid seeds costly?
Which one of the followmg bacterium is used for the production of transgenic plants?
Expand GMO. How is it different from a hybrid?
Highlight any four areas where genetic modification of plants has been useful.
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RNA interference (RNAi) holds great potential as a therapeutic agent for the treatment of human diseases and as biocontrol agents in controlling pests in the field agriculture. An experiment was carried to study the use of 'RNAi' for the potential treatment of disorders of cholesterol metabolism. Some people possess genetic mutations with elevated levels of ApoB gene which predisposes them to coronary artery diseases. Lowering the amount ApoB can reduce the number of lipoproteins and lower the blood cholesterol. Tracy Zimmerman and her colleagues used RNAi in 2006 to reduce the level of ApoB in non human primates Cynomolgus monkeys. One group of monkeys were given RNAi treatment (small interfering RNAs, SiRNAs) (doses 1 mg/kg, SiRNAs), second group of monkeys were given RNAi treatment (doses 2.5 mg/kg, SiRNAs) and third group of monkeys were injected with saline. |
The results of the study are depicted in the graph below:
- How does the treatment with 2.5 mg/kg bring an effect on cholesterol metabolism when compared from 24 hours and 144 hours?
- Write any two natural sources from where dsRNA molecule could be obtained for silencing the specific mRNA.
- How is RNAi used in controlling the infection on the roots of tobacco plants by the nematode Meloidogyne incognitia?
On spraying Bacillus thuringiensis on an infected cotton crop field the pests are killed by the toxin, however the toxin although produced by the bacteria does not affect it. Explain giving reason.
State any two benefits of Genetically modified crops.
