Questions and answers for exam Preparation

MCQs

Total Questions : 222 | Page 4 of 23 pages

Question 31. Which of the following metabolites are implicated in stress tolerance?

Proline
Betaines
Both (a) and (b)
Citrate

Discuss Question

Answer: Option C. -> Both (a) and (b)
Answer: (c).Both (a) and (b)

Question 32. Which of the following gene detoxifies herbicide phosphinothricin?

Nitrilase
Glutathione S-transferase (GST)
Phosphinothricin acetyl transferase
All of these

Discuss Question

Answer: Option C. -> Phosphinothricin acetyl transferase
Answer: (c).Phosphinothricin acetyl transferase

Question 33. Which of the agricultural challenges below cannot be solved with transgenic techniques?

Crops are damaged by frost
Crops are killed by a virus
Public concern about safety of synthetic pesticides
Public preference for organic vegetables

Discuss Question

Answer: Option D. -> Public preference for organic vegetables
Answer: (d).Public preference for organic vegetables

Question 34. Which of the following gene is responsible for resistance against chilling?

Glycerol 1 phosphate acyl transferase
Polygalactouranase
ACC deaminase
Sucrose phosphate synthase gene

Discuss Question

Answer: Option A. -> Glycerol 1 phosphate acyl transferase
Answer: (a).Glycerol 1 phosphate acyl transferase

Question 35. Which of the following statements is true regarding genomics?

Plant genomics lags behind similar efforts in animals and microorganisms
Researchers can make use of genomic information even if the entire genome of an organism is not known
Researchers are busy in trying to determine the genome of the potato plant
All of the above

Discuss Question

Answer: Option D. -> All of the above
Answer: (d).All of the above

Question 36. Transgenic plants

contain foreign genes in their cells
are used to produce human antibodies
both (a) and (b)
are plants that differ in geographical locations

Discuss Question

Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)

Question 37. If the goal were to create a plant resistant to an insecticide, which cell-based plant technology would be most effective?

Clonal propagation
Cybridization
Protoplast fusion
Mutant selection

Discuss Question

Answer: Option D. -> Mutant selection
Answer: (d).Mutant selection

Question 38. Low temperatures induce the expression of many cold-induced genes. Transgenic plants with improved cold tolerance have been produced by

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

Discuss Question

Answer: Option A. -> expressing the protein that activates expression of these genes all the time in plants
Answer: (a).expressing the protein that activates expression of these genes all the time in plants

Question 39. What are the various disadvantages of cross protection?