Plant Biotechnology MCQs | Page - 2

Dear candidates you will find MCQ questions of Plant Biotechnology here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

📊 Plant Biotechnology
Q. Tobacco leaf discs are transferred with Agrobacterium tumefaciens strain containing binary vector (GUS as reporter gene) with selectable marker neo (kanamycin resistance gene) and then regenerated to plants. The plants are kanamycin resistant, but leaf tissues are negative to GUS assay. The explanation is
  • (A) The plants are transformed for both genes but GUS gene is turned
  • (B) The plants are transformed for only neo gene not the GUS gene
  • (C) The plants are not transformed at all, but the development of kanamycin resistance is due to somaclonal variation
  • (D) All the above
💬 Discuss
✅ Correct Answer: (D) All the above
📊 Plant Biotechnology
Q. The plant hormone indole-3-acetic acid is derived from
  • (A) Histidine
  • (B) Tyrosine
  • (C) Tryptophan
  • (D) Proline
💬 Discuss
✅ Correct Answer: (C) Tryptophan
📊 Plant Biotechnology
Q. Hormone pairs required for a callus to differentiate are
  • (A) Auxin and cytokinin
  • (B) Auxin and gibberellin
  • (C) Ethylene and gibberellin
  • (D) Cytokinin and gibberellin
💬 Discuss
✅ Correct Answer: (A) Auxin and cytokinin
📊 Plant Biotechnology
Q. Resistance to herbicide chlorsulfuron in plants is due to change in
  • (A) Glutamine synthetase
  • (B) Acetolactate synthase
  • (C) Theronine deaminase
  • (D) DNA polymerase
💬 Discuss
✅ Correct Answer: (B) Acetolactate synthase
📊 Plant Biotechnology
Q. The pungency of mustard seeds is primarily due to secondary metabolites such as isothiocyanate and nitrile. The pungency is usually felt only when the seeds are crushed. This is because of
  • (A) The coat of the intact seeds blocks the pungent volatiles from being released
  • (B) The pungent chemicals are stored as inactive conjugates and compartmentalized from the enzymes that convert them into active chemicals
  • (C) The pungent chemicals are formed only after the reaction with atmospheric oxygen
  • (D) The pungent chemicals are formed only after the reaction with atmospheric carbon dioxide
💬 Discuss
✅ Correct Answer: (B) The pungent chemicals are stored as inactive conjugates and compartmentalized from the enzymes that convert them into active chemicals
📊 Plant Biotechnology
Q. Majority of the cereals are highly recalcitrant to Agrobacterium mediated transformation, and so direct transformation methods have been developed to transform such plants. Which of the following direct transformation methods is applicable to intact plant tissues?
  • (A) Calcium chloride and PEG-mediated transformation
  • (B) Liposome-mediated transformation
  • (C) Electroporation
  • (D) Transformation using micro projectiles
💬 Discuss
✅ Correct Answer: (B) Liposome-mediated transformation
📊 Plant Biotechnology
Q. Vincristine and vinblastine, two commercially important secondary metabolites from Catharanthus roseus, are examples of
  • (A) Alkaloids
  • (B) Flavonoids
  • (C) Terpenoids
  • (D) Steroids
💬 Discuss
✅ Correct Answer: (A) Alkaloids
📊 Plant Biotechnology
Q. Agrobacterium based transformation of protoplasts obtained from dicots is based on the fact that
  • (A) These exhibit strong chromosomal structures
  • (B) These have two cotyledons
  • (C) These exhibits strong wound response
  • (D) These have long tap root system
💬 Discuss
✅ Correct Answer: (C) These exhibits strong wound response
📊 Plant Biotechnology
Q. Hydrated synthetic seeds which are produced by ion exchange reaction involve mixing the somatic embryos in a solution of
  • (A) Sodium alginate and dropping it in a solution of calcium nitrate
  • (B) Calcium alginate and dropping it in a solution of sodium nitrate
  • (C) Calcium alginate and dropping it in a solution of ammonium nitrate
  • (D) Mannitol and dropping it in a solution of sodium nitrate
💬 Discuss
✅ Correct Answer: (A) Sodium alginate and dropping it in a solution of calcium nitrate
📊 Plant Biotechnology
Q. Gynogenesis is a process of development of haploid plants
  • (A) From a fertilized cell of female gametophyte
  • (B) From an unfertilized cell of female gametophyte
  • (C) From isolated pollen grains
  • (D) By selective elimination of chromosomes following distant hybridization
💬 Discuss
✅ Correct Answer: (B) From an unfertilized cell of female gametophyte

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