Advertisements
Advertisements
प्रश्न
Why does Bt toxin not kill the bacterium that produces it, but kill the insect that ingests it?
Advertisements
उत्तर
Bt toxin is produced by a soil bacterium called Bacillus thuringiensis. This toxin does not kill the bacteria because when it is present in the bacteria, it is in an inactive and crystalline form.
It becomes active and toxic when it is consumed by insects such as such as lepidopterans (armyworm), coleopterans (beetles) and dipterans (flies/ mosquitoes).
The activated toxin (delta endotoxins) binds to the epithelial cells in the midgut of an insect and creates pores that cause lyses and swelling, eventually killing the insect.
APPEARS IN
संबंधित प्रश्न
Recombination DNA−technology is of great importance in the field of medicine. With the help of a flow chart, show how this technology has been used in preparing genetically engineered human insulins.
Compare and contrast the advantages and disadvantages of the production of genetically modified crops.
Diagrammatically represent the experimental steps in cloning and expressing an human gene (say the gene for growth hormone) into a bacterium like E. coli?
Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and the chemistry of oil?
Describe the role of high temperature.
A patient suffering from diabetes mellitus will have ______.
Which is false about antibiotics?
When a foreign DNA is introduced into an organism, how is it maintained in the host and how is it transferred to the progeny of the organism?
A patient is suffering from ADA deficiency. Can he be cured? How?
List the disadvantages of insulin obtained from the pancreas of slaughtered cows and pigs:
