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Rhodospirillum adopt photo mode of nutrition. (heterotrophic/autotrophic)

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Important Questions on Bacteria

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Methanogens belong to:
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The true nucleus is absent in:
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The primary producers of the deep-sea hydrothermal vent ecosystem are
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Which of the following are found in extreme saline conditions?
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The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:
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DNA replication in bacteria occurs
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The guts of cow and buffalo possess:
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Ruminant animals can digest cellulose in their food, whereas human beings are unable to do so. This is because.
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Which one of the following statements is wrong?
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Pick up the wrong statement.
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Anoxygenic photosynthesis is characteristic of:
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A bacterial colony is produced from
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Archaebacteria differs from eubacteria in:
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Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
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Which of the following is incorrect about Cynobacteria?
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Match the following lists:

  List-I   List-II
(A) Photoautotroph (I) Nitrosomonas
(B) Chemoautotroph (II) Rhodospirillum
(C) Photoheterotroph (III) Salmonella
(D) Chemoheterotroph (IV) Chlorobium

The correct match is:

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Identify combination of incorrect statements related to Cyanobacteria
I. Cyanobacteria are referred to as blue-green algae.
II. They perform oxygenic photosynthesis in chloroplasts.
II. The red-colour of red-sea is due to the presence of a cyanobacterial species Trichodesmium erythraeum.
IV. All the cyanobacterial species can fix atmospheric N2 in specialised cells called heterocysts.
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Cell wall is absent in:
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Bacteria are grouped under four categories based on their shape. Study the given figure and identify A. B. C and D?

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In a mixed culture of slow and fast growing bacteria, penicillin will