Advertisements
Advertisements
प्रश्न
What are cry proteins?
Advertisements
उत्तर १
Cry protein is a toxic protein coded by the cry gene. There are many types of cry proteins; for example, the proteins coded by the genes cryIAc and cryIIAb control cotton budworm, while cryIAb controls corn borer.
उत्तर २
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.
APPEARS IN
संबंधित प्रश्न
Answer the following question.
List any four ways by which GMOs have been useful for enhanced crop output.
Which one of the followmg bacterium is used for the production of transgenic plants?
Bt cotton is not ______.
In view of the current food crisis, it is said, that we need another green revolution. Highlight the major limitations of the earlier green revolution.
|
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.
"RNA interference has been used to produce transgenic tobacco plants to protect them from the infestation by specific nematodes." Explain the novel strategy exploited by the biotechnologists.
Name an organism that produces cry proteins.
The capacity to generate a whole plant from any cell of the plant is called ______.
Which one of the following bacteria are used to produce insect resistant transgenic cotton?
