Multiple Choice QuestionsTobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells).
Both sense and anti-sense RNA
A particular hormone
An antifeedant
An antifeedant
The first clinical gene therapy was given for treating
diabetes mellitus
chicken pox
rheumatoid arthritis
rheumatoid arthritis
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.
The crops engineered for glyphosate are resistant/ tolerant to
fungi
bacteria
insects
insects
Read the following four statements (I - IV) about certain mistakes in two of them
I .The first transgenic buffalo, Rosie produced mile which was human alpha - lactal bumin enriched
II. Restriction enzymes are used in isolation of DNA from another macro -molecules.
III. downstream processing is one of the steps of R-DNA technology.
IV. Disarmed pathogen vectors are also used in the transfer of R - DNA into the host.
Which are the two statements having mistakes?
Statement (II) and (III)
Statements (III) and (IV)
Statements (I) and (III)
Statements (I) and (III)
Some of the characteristics of Bt cotton are
long fibre and resistance of 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 production of toxic protein crystals which kill dipteran pests
Which one of the following proved effective for biological control of nematodal diseases in plants?
Pisolithus tinctorius
Pseudomonas cepacin
Gliocladium virens
Gliocladium virens
Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
Frequent irrigation of the crop
Treatment of the plants with cytokinins alongwith a small dose of nitrogenous fertilizer
Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5- trichlorophenoxy acetic acid
Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5- trichlorophenoxy acetic acid
Microbes found to be very useful in genetic engineering are
Escherichia coli and Agrobacterium tumefaciens
Vibrio cholerae and a tailed bacteriophage
Diplococcus sp. and Pseudomonas sp
Diplococcus sp. and Pseudomonas sp
Triticale, the first man-made cereal crop, has been obtained by crossing wheat with
rye
pearl millet
sugarcane
sugarcane
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