Transgenic Plant problems
- 1. Which of the following statements is true regarding genomics?
Options- A. Plant genomics lags behind similar efforts in animals and microorganisms
- B. Researchers can make use of genomic information even if the entire genome of an organism is not known
- C. Researchers are busy in trying to determine the genome of the potato plant
- D. All of the above Discuss
Correct Answer: All of the above
- 2. Resistance to sulphonyl urea compounds in transgenic tobacco plant has been developed by the transfer of
Options- A. gene for EPSPS (5-enol-pyruvyl shikimat 3 phosphate synthase)
- B. gene for ALS (acetolactate synthase)
- C. gene for GS (glutamine synthase)
- D. any of the above Discuss
Correct Answer: gene for ALS (acetolactate synthase)
- 3. Two genes from a bacterium (Alcaligenes eutrophus) and a cotton gene produce
Options- A. a plastic
- B. a vaccine against the bacterium
- C. a pharmaceutical product
- D. herbicide resistance Discuss
Correct Answer: a plastic
- 4. Low temperatures induce the expression of many cold-induced genes. Transgenic plants with improved cold tolerance have been produced by
Options- 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 Discuss
Correct Answer: expressing the protein that activates expression of these genes all the time in plants
- 5. Which of the following compounds has been produced in transgenic plants to improve tolerance to salt stress and water deficit?
Options- A. Sucrose
- B. Mannitol
- C. Nicotine
- D. Octopine Discuss
Correct Answer: Mannitol
- 6. Which of the following has been widely used to provide resistance against plant viruses?
Options- A. Virus resistance genes from bacteria
- B. Expression of virus coat protein genes in transgenic plants
- C. Expression of anti-virus genes in vectors that transmit viruses
- D. Expression of ribonuclease (RNase) genes in host plants Discuss
Correct Answer: Expression of virus coat protein genes in transgenic plants
- 7. Cross protection against viruses in transgenic plants can be obtained by
Options- 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 Discuss
Correct Answer: inoculating the susceptible strain of a crop with a mild strain of a virus that helps in developing resistance against more virulent strain
- 8. Reducing the expression of pectin methylesterase (PME) has resulted in
Options- A. plants with resistance to bacteria and fungi
- B. tomato juice that has higher viscosity
- C. tomato fruit that last longer before they become rotten
- D. tomato fruit that will not ripen Discuss
Correct Answer: tomato juice that has higher viscosity
- 9. The controversy regarding the use of Bt corn is that it
Options- A. is potentially harmful to monarch butterflies
- B. is a potential allergen to humans
- C. both (a) and (b)
- D. can contaminate groundwater Discuss
Correct Answer: both (a) and (b)
- 10. The first field tests were conducted with which of the following genetically altered organism?
Options- A. bt Corn
- B. Vaccinia virus containing a gene from the rabies virus
- C. The flavrsavr tomato
- D. Strawberry seedlings sprayed with ice-minus bacteria Discuss
Correct Answer: Strawberry seedlings sprayed with ice-minus bacteria
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