Transgenic Plant
Which of the following compounds has been produced in transgenic plants to improve tolerance to salt stress and water deficit?

Mannitol
Nicotine
Sucrose
Octopine

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Transgenic Plant
Low temperatures induce the expression of many cold-induced genes. Transgenic plants with improved cold tolerance have been produced by

expressing a gene for production of antifreeze (ethylene glycol) in plants
increasing evaporative cooling from leaf surfaces
cooling plants using the Peltier effect
expressing the protein that activates expression of these genes all the time in plants

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Transgenic Plant
Which of the following has been widely used to provide resistance against plant viruses?

Expression of ribonuclease (RNase) genes in host plants
Expression of anti-virus genes in vectors that transmit viruses
Virus resistance genes from bacteria
Expression of virus coat protein genes in transgenic plants

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