Which of the following is correct with respect to heterocyst

  1. Nostoc, Anabena
  2. Only Anabena
  3. Nostoc
  4. All eubactetia
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Chemosynthetic autotrophic bacteria does not help in recycling of

  1. Nitrogen
  2. Iron
  3. Sulphur
  4. Mangnese 
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Chemosynthetic bacteria does not use which inorganic substrate?

  1. Nitrites
  2. Nitrates
  3. Chlorides
  4. Both a and b
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Chemosynthetic autotrophs derive energy by

  1. By sunlight
  2. By oxidation of inorganic substances
  3. By reduction of inorganic substances
  4. By reduction followed by oxidation of inorganic substances
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The majority of heterotrophic bacteria are

  1. Decomposers
  2. Autotrophs
  3. Lithotrophs
  4. Organotrophs
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Lactobacillus comes under which category

  1. Autotrophs
  2. Lithotrophs
  3. Organotrophs
  4. Heterotrophs
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Leguminous plants have bacteria with which kind of mode of nutrition-

  1. Heterotrophs
  2. Autotrophs
  3. Lithotrophs
  4. Organotrophs
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Which of the following is not a bacterial disease

  1. Citrus canker
  2. Cholera
  3. Plague
  4. Mumps
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Which of the following is not a mode of bacterial reproduction?

  1. Fission
  2. Spore formation
  3. Conjugation
  4. Fragmentation
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Mycoplasma are not possessing which of the following features?

  1. Lack cell wall
  2. Pleomorphic
  3. Can't survive without oxygen
  4. Except b all are correct
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