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MCQs

Total Questions : 572 | Page 8 of 58 pages
Question 71. Light absorbed by chlorophyll is converted into
  1.    light energy
  2.    autotrophic energy
  3.    chemical energy
  4.    kinetic energy
 Discuss Question
Answer: Option C. -> chemical energy
Answer: (c).chemical energy
Question 72. Upon dissolving sodium hydrogen carbonate (HCO₃⁻) in water (H₂O), the gas given off is
  1.    hydrogen
  2.    oxygen
  3.    carbon dioxide
  4.    chlorine
 Discuss Question
Answer: Option C. -> carbon dioxide
Answer: (c).carbon dioxide
Question 73. First stable form of carbohydrates (CₙH₂ₘOₘ) formed in photosynthesis is
  1.    complex sugars
  2.    disaccharides
  3.    cellulose
  4.    glucose
 Discuss Question
Answer: Option D. -> glucose
Answer: (d).glucose
Question 74. For many autotrophic organisms, an essential source of energy is
  1.    soil
  2.    nutrients
  3.    light
  4.    eating plants
 Discuss Question
Answer: Option C. -> light
Answer: (c).light
Question 75. During darkness in plants
  1.    starch is converted in sugars
  2.    sugars is converted in starch
  3.    glycogen is converted into glucose
  4.    glucose is converted into glycogen
 Discuss Question
Answer: Option A. -> starch is converted in sugars
Answer: (a).starch is converted in sugars
Question 76. First step in seed germination is
  1.    passing through the gut of an animal
  2.    exploding along the sutures
  3.    absorption of water
  4.    taking in of O₂
 Discuss Question
Answer: Option C. -> absorption of water
Answer: (c).absorption of water
Question 77. During dormancy, the seeds
  1.    do not respire
  2.    respire aerobically
  3.    respire anaerobically
  4.    photosynthesis
 Discuss Question
Answer: Option C. -> respire anaerobically
Answer: (c).respire anaerobically
Question 78. Several of 10,000 years old seeds germinated within
  1.    48 hours
  2.    two weeks
  3.    few hours
  4.    1 hour
 Discuss Question
Answer: Option A. -> 48 hours
Answer: (a).48 hours
Question 79. Embryo starts to grow when the
  1.    food reserves inside seed are broken down
  2.    seed has undergone an appropriate resting season
  3.    seed coat turns hard
  4.    none of others
 Discuss Question
Answer: Option C. -> seed coat turns hard
Answer: (c).seed coat turns hard
Question 80. Germination of 10,000 years old seeds was observed in
  1.    Melon family
  2.    Arctic Tundra Lupine
  3.    Moth Mullein
  4.    Hesperidiums
 Discuss Question
Answer: Option B. -> Arctic Tundra Lupine
Answer: (b).Arctic Tundra Lupine

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