121.

Tobacco 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

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