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MCQs

Total Questions : 139 | Page 3 of 14 pages
Question 21. From which of following autotroph organisms obtain energy?
  1.    oxygen
  2.    sulphur
  3.    CO₂
  4.    hydrogen
 Discuss Question
Answer: Option A. -> oxygen
Answer: co2
Question 22. In process of nitrogen fixation, nitrogen is converted in to which of following?
  1.    ammonia
  2.    methane
  3.    nitric acid
  4.    nitrous oxide
 Discuss Question
Answer: Option A. -> ammonia
Answer: (a).ammonia
Question 23. An ecological relationship in which one participant benefits and other is harmed is called
  1.    parasitism
  2.    symbiosis
  3.    mutualism
  4.    commensalism
 Discuss Question
Answer: Option A. -> parasitism
Answer: (a).parasitism
Question 24. Which of following is caused by Shigella bacterium?
  1.    dysentery
  2.    cholera
  3.    measles
  4.    shingles
 Discuss Question
Answer: Option A. -> dysentery
Answer: (a).dysentery
Question 25. Prokaryotic population originated about how many billion years ago?
  1.    1
  2.    2
  3.    3.5
  4.    9
 Discuss Question
Answer: Option C. -> 3.5
Answer: (c).3.5
Question 26. Which of following have only one kind of RNA polymerase?
  1.    bacteria
  2.    archaea
  3.    fungi
  4.    plants
 Discuss Question
Answer: Option C. -> fungi
Answer: methanebacteria
Question 27. Deinococcus radiodurans can survive in which of following extreme conditions?
  1.    heat
  2.    CO₂
  3.    ph
  4.    radiation
 Discuss Question
Answer: Option D. -> radiation
Answer: (d).radiation
Question 28. 'marsh gas' present in marches is actually
  1.    carbon dioxide
  2.    methane
  3.    sulphuric acid
  4.    nitrogen
 Discuss Question
Answer: Option B. -> methane
Answer: (b).methane
Question 29. Lyme disease is carried by which of following vectors?
  1.    mosquito
  2.    ticks
  3.    cows
  4.    spiders
 Discuss Question
Answer: Option B. -> ticks
Answer: (b).ticks
Question 30. Which of following archaea is used as source of DNA polymerase for use in laboratory experiments?
  1.    treponema pallidum
  2.    Halobacterium
  3.    Borrelia burgdorferi
  4.    Pyrococcus furiosus
 Discuss Question
Answer: Option D. -> Pyrococcus furiosus
Answer: (d).Pyrococcus furiosus

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