What is meant by the term bio-pesticide ? Name and explain the mode of action of a popular biopesticide.
What is meant by the term bio-pesticide ? Name and explain the mode of action of a popular biopesticide.
Biopesticide is a pesticide which is $(a)$ not chemical in nature $(b)$ more specific in action against the pest $(c)$ safer for environment than chemical pesticides
A popularly known bio-pesticide is $Bt$ toxin, which is produced by a bacterium called Bacillus thuringiensis. $Bt$ toxin gene has been cloned from this bacterium and expressed in plants. $Bt$ toxin protein when ingested by the insect, gets converted to its active form due to the alkaline $\mathrm{pH}$ of the gut. The activated toxin binds to the surface of midgut epithelial cells and create pores that cause cell swelling and lysis and eventually kills the insect.
Similar Questions
Expand $GMO$. How is it different from a hybrid ?
Expand $GMO$. How is it different from a hybrid ?
Bt cotton is
Bt cotton is
Given below are two statements:
Statement $I$ : Bt toxins are insect group specific and coded by a gene cry $IAc$.
Statement $II$ : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets converted into active form due to acidic $\mathrm{pH}$ of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements:
Statement $I$ : Bt toxins are insect group specific and coded by a gene cry $IAc$.
Statement $II$ : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets converted into active form due to acidic $\mathrm{pH}$ of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:
- [NEET 2024]
Compare and contrast the advantages and disadvantages of production of genetically modified crops.
Compare and contrast the advantages and disadvantages of production of genetically modified crops.
$A$ : Biofortified crops such as golden rice are helpful in overcoming the problem of night blindness in developing nations.
$R $ : It has enhanced nutritional content of vitamin $A.$
$A$ : Biofortified crops such as golden rice are helpful in overcoming the problem of night blindness in developing nations.
$R $ : It has enhanced nutritional content of vitamin $A.$