Advertisements
Advertisements
प्रश्न
What are cry-proteins?
Advertisements
उत्तर
Bacillus thuringiensis secretes harmful proteins known as insecticidal proteins in the form of cry proteins during a certain growth step. Cry, a gene, codes for the toxin. B. thuringiensis cry protein-encoding genes, often known as Bt toxin genes, have been identified and inserted into numerous crop plants, including Bt cotton, Bt corn, etc., to give insect pest resistance.
संबंधित प्रश्न
How has RNAi technique helped to prevent the infestation of roots in tobacco plants by a nematode Meloidegyne incognitia?
What are Cry proteins?
Answer the following question.
List one advantage and one disadvantage of an apomictic crop.
Cry-genes have been introduced in:
A protoxin is ______.
Bt toxin obtained from ______.
Highlight any four areas where genetic modification of plants has been useful.
|
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?
State any two benefits of Genetically modified crops.
Name an organism that produces cry proteins.
