The first transgenic plants expressing engineered foreign genes were tobacco plants produced by the use of:
A) Agrobacterium tumefaciens
B) Bacillus thuringiensis
C) Arabidopsis thaliana
D) Streptomyces hygroscopicus
Low temperatures induce the expression of many cold-induced genes. Transgenic plants with improved cold tolerance have been produced by:
A) Expressing the protein that activates expression of these genes all the time in plants
B) Cooling plants using the Peltier effect
C) Expressing a gene for production of antifreeze (ethylene glycol) in plants
D) Increasing evaporative cooling from leaf surfaces
A naturally occurring variant, possessing characteristics of interest, is identified. This plant is selectively bred. This is an example of:
A) Traditional plant breeding
B) Transgenic technology
C) Mutant selection
D) None of these
Which of the following genes can be used for making resistances against viral infection?
A) Genes for capsid protein
B) Gene for nucleocapsid protein
C) Satellite RNA
D) All of these
Cross protection against viruses in transgenic plants can be obtained by:
A) Inoculating the susceptible strain of a crop with a mild strain of a virus that helps in developing resistance against more virulent strain
B) Inoculating the susceptible strain with the coat proteins of virulent strain
C) Inoculating the susceptible strain with genes of nucleocapsid
D) Any of the above
Which of the following compounds has been produced in transgenic plants to improve tolerance to salt stress and water deficit?
A) Sucrose
B) Mannitol
C) Nicotine
D) Octopine
Expression of antisense RNA in transgenic plants is a general method used to:
A) Activate the expression of all genes in a biochemical pathway
B) Eliminate the expression of all genes in a biochemical pathway
C) Block the expression of virus coat protein genes
D) Reduce or eliminate the expression of individual genes
In transgenic plants that have been manipulated to express pathogenesis-related (PR) proteins all the time, it has been shown that:
A) These provide no protection at all against pathogens
B) Expression of one PR protein provides high levels of protection against many pathogens
C) Expression of two PR proteins provides some protection against a few pathogens
D) These proteins trigger the production of other antimicrobial defenses
Cell fusion method includes the preparation of large number of:
A) Plant cells stripped of their cell wall
B) Single plant cell stripped of their cell wall
C) Plant cells with cell wall
D) Cells from different species
Protoplasts are the cells devoid of:
A) Cell membrane
B) Cell wall
C) Both cell wall and cell membrane
D) None of these
Organogenesis is:
A) Formation of callus tissue
B) Formation of root and shoots on callus tissue
C) Both (A) and (B)
D) Genesis of organs
Protoplasts can be produced from suspension cultures, callus tissues or intact tissues by enzymatic treatment with:
A) Cellulotyic enzymes
B) Pectolytic enzymes
C) Both Cellulotyic and Pectolytic enzymes
D) Proteolytic enzymes

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