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MCQs

Total Questions : 81 | Page 6 of 9 pages
Question 51. How many isoprene units, are there in sesquiterpenes?
  1.    1
  2.    2
  3.    3
  4.    8
 Discuss Question
Answer: Option C. -> 3
Answer: (c).3
Question 52. Deficiency of which mineral causes dark green coloration of the leaves?
  1.    Phosphorus
  2.    Potassium
  3.    Nitrogen
  4.    Calcium
 Discuss Question
Answer: Option A. -> Phosphorus
Answer: (a).Phosphorus
Question 53. Which of the following is deficiency symptom of magnesium?
  1.    Chlorosis in young leaves
  2.    Chlorosis in older leaves
  3.    Spindly and woody stem
  4.    Elongated stem
 Discuss Question
Answer: Option B. -> Chlorosis in older leaves
Answer: (b).Chlorosis in older leaves
Question 54. Which of the following class of enzyme does not need manganese for its efficient activity?
  1.    Dehydrogenase
  2.    Decarboxylases
  3.    Kinases
  4.    Nitrogenase
 Discuss Question
Answer: Option D. -> Nitrogenase
Answer: (d).Nitrogenase
Question 55. Growth regulators, which control plant growth and development are called___________
  1.    Secondary metabolites
  2.    Macro element
  3.    Nonessential elements
  4.    Phytohormone
 Discuss Question
Answer: Option D. -> Phytohormone
Answer: (d).Phytohormone
Question 56. Growth in plants is mainly driven by turgor pressure.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 57. Which of the following is NOT a plant hormone?
  1.    Corticosteroid
  2.    Brassinosteroid
  3.    Polyamines
  4.    Salicylic acid
 Discuss Question
Answer: Option A. -> Corticosteroid
Answer: (a).Corticosteroid
Question 58. Name the plant in which auxin was first discovered?
  1.    Mustard
  2.    Pea
  3.    Oats
  4.    Rice
 Discuss Question
Answer: Option C. -> Oats
Answer: (c).Oats
Question 59. Which of the following is NOT a naturally occurring auxin?
  1.    Indole 3-acetic acid (IAA)
  2.    Indole 3-butyric acid (IBA)
  3.    Phenyl acetic acid (PAA)
  4.    2,4-D
 Discuss Question
Answer: Option D. -> 2,4-D
Answer: (d).2,4-D
Question 60. Name the amino acid which acts as a precursor of auxin biosynthesis?
  1.    Serine
  2.    Tryptophan
  3.    Valline
  4.    Tyrosine
 Discuss Question
Answer: Option B. -> Tryptophan
Answer: (b).Tryptophan

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