In Bt cotton, the Bt toxin present in plant tissue as pro-toxin is converted into active toxin due to
alkaline pH of the insect gut
acidic pH of the insect gut
action of gut microorganisms
action of gut microorganisms
A.
alkaline pH of the insect gut
The Bt toxin is an inactive protoxin, which is activated due to the alkaline pH in the insect gut.
Bt toxin dissolve in high pH of insect gut and become active. The toxins then attack the gut cells of the insect, punching holes in the lining.
(i) Insect eats Bt crystals and spores.
(ii) The toxin binds to specific receptors in the gut and the insects stops eating.
(iii) The crystals cause the gut wall to break down allowing spores and normal gut bacteria to enter the body.
(iv) The insect dies as spores and gut bacteria proliferate in the body.
Vertical distribution of different species occupying different levels in a biotic community is known as
divergence
stratification
zonation
zonation
Which of the following enhances or induces fusion of protoplasts?
Sodium chloride and potassium chloride
Polyethylene glycol and sodium nitrate
IAA and kinetin
IAA and kinetin
Which body of the Government of India regulates GM research and safety of introducing GM organisms for public services?
Bio-safety committee
Indian Council of Agricultural Research
Genetic Engineering Approval Committee
Genetic Engineering Approval Committee
Which is the most common mechanism of genetic variation in the population of sexually reproducing organism?
Transduction
Chromosomal aberrations
Genetic drift
Genetic drift
In which of the following both pairs have correct combination
In situ conservation/National park
Ex situ conservation/Botanical garden
In situ conservation/Cryopreservation
Ex situ conservation/Wildlife Sanctuary
In situ conservation/Seed Bank
Ex situ conservation/National Park
In situ conservation/Seed Bank
Ex situ conservation/National Park
A technique of micropropagation is
somatic hybridization
somatic embryogenesis
protoplast fusion
protoplast fusion
The crops engineered for glyphosate are resistant/ tolerant to
fungi
bacteria
insects
insects
The UN Conference of Parties on climate change in the year 2011 was held in
Poland
South Africa
Peru
Peru
Multiple alleles are present
On different chromosomes
At different loci on the same chromosome
at the same locus of the chromosome
at the same locus of the chromosome
