A natural form of genetic engineering is exhibited by
Haemophilus influenzae
E.coli
Dolly
Agrobacterium tumefaciens
D.
Agrobacterium tumefaciens
Agrobacterium tumefaciens is known as natural genetic engineer. It is known to infect broad leaved crops such as, tomato, soyabean and tobacco. It causes tumours called crown galls. The tumour formation is induced by its plasmid-Ti. The plasmid integrates a segment of its DNA called T-DNA into chromosomal DNA of its host plant cells. It then causes tumours. i.e., gene transfer occurs without human effort.
Which one of the following statements is wrong in relation to transgenic Bt cotton plant?
Crop yield loss due to the attack by Bacillus thuringiensis bacterium is reduced
Crop yield loss due to the attack by lepidopteran insect pests is reduced
The use of chemical insecticides in the cotton field is minimised
Better quality cotton is produced
Genetically improved crop varieties can be developed in laboratory by
somatic hybridisation
transgenic technology
cell suspension culture
somaclonal variation
The replacement of a normal gene by its specifically mutated copy is
Gene cloning
Gynogenesis
Gene knockout
lnterparietal hybridisation
Which one of the following bacteria has found extensive use in genetic engineering work in plants?
Bacillus coagulens
Agrobacterium tumefaciens
Bacillus subtilis
E. coli
Flavr savr variety of tomato is a
mutated form
somaclonal variety
transgenic crop
high yielding variety
Gene therapy has been successful in curing Codes genetic diseases in laboratory animals through
exposure to X-ray to rectify the defective gene
replacing the defective gene with a functional gene
oral delivery of genes
use of therapeutic medicines to rectify the defective gene
In which of the following, determination of order of bases in a DNA molecule takes place
Gene probing
Gene splicing
Gene mapping
Gene sequencing
