A scientist is attempting to develop a transgenic crop resistant to a specific lepidopteran pest. Which gene would be the LEAST suitable candidate for transfer?
A gene encoding a Bt toxin
A gene conferring resistance to a bacterial pathogen
A gene involved in photosynthesis
A gene encoding a protein that disrupts insect gut function
Related Questions
One of the major difficulties in the biological control of insect pest is that the
Method is less effective as compared with the use of insecticides
Predator does not always survive when transferred to a new environment
Predator develops a preference to other diets and may itself become a pest
Practical difficulty of introducing the predator to specific area
What is true about Bt toxin?
The inactive protoxin gets converted into active form in the insect gut
Bt protein exists as active toxin in the Bacillus
The activated toxin enters the ovaries of the pest to sterilize it and thus, prevent its multiplication
The concerned Bacillus has antitoxins
Consider the following statements about Bt I. The bacteria Bacillus thuringiensis (Bt) are used to control butterfly catterpillers II. Fresh spores of Bt are mixed with water and sprayed on seeds such as brassicas and fruit trees III. Insect larvae, after eating these are killed by the toxin released in their gut IV. Bt toxin genes have been introduced into plants to provide resistance to pests Which of the statements given above are correct?
I and II only
II and III only
I, II and III only
I, II, III and IV
Select an incorrect statement for Bt Cotton
B.thuringiensis forms protein crystals during all phases of growth
Bt toxin proteins exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin
The activated toxin binds to the surface of midgut epithelial cells of insects and create pores
Most Bt toxins are insect-group specific
The aims and objectives of Genetic Engineering Approval Committee are
I. To permit the use of genetically modified organisms and their product for commercial applications
II. To adopt the procedures for restriction, production and application of GM organisms
III. approval to conduct large scale field trails and release of transgenic crops in the environment
Which of the statements are given above are correct?
I and II
I and III
II and III
I, II and III
The green revolution succeeded in increasing the yield of crops mainly due to the use of
I. improved varieties of the crops
II. agro-chemicals
III. better management practices
Choose the correct option
I and II
I and III
II and III
I, II and III
Genetic engineering is related with
Eugenics
Euphenics
Euthenics
All of these
The most likely reason for the development of resistance against pesticides in insect damaging a crop is
The pesticide causes mutations in the insects that make them resistant.
Some insects have genes that make them resistant to the pesticide, and these genes are passed on to their offspring.
The insects learn to avoid areas where the pesticide has been applied.
The pesticide strengthens the insects' immune systems, making them resistant.
One of the major difficulties in the biological control of insect pest is that the
Method is less effective as compared with the use of insecticides
Predator does not always survive when transferred to a new environment
Predator develops a preference to other diets and may itself become a pest
Practical difficulty of introducing the predator to specific area
Some of the characteristics of Bt cotton are
Long fibre and resistance to aphids
Medium yield, long fibre and resistance to beetle pests
High yield and production of toxic protein crystals which kill dipteran pests
High yield and resistance to bollworms
