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Define chemoautotrophs....

Define chemoautotrophs.

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Some organisms prepare their food by chemo- synthesis i.e., they use energy released during chemical reactions for synthesis of food. e.g., Nitrifying bacteria-Nitrosomonas, Sulphur bacteria- Thiobacillus, Iron bacteria-Ferrobacillus.
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Which of the following is the correct sequence of events in the origin of life? a. Reducing atmosphere. Br b. Origin of chemoautotrophs. Br c. Origin of genetic material. Br d. Origin of chemoheterotrophs.

Give three examples of chemoautotrophs.

Knowledge Check

  • Assertion :- Nitrifying bacteria are chemoautotrophs. Reason:- Nitrifying bacteria obtain energy from oxidation of NH _(3) and NO _(2) ^(-)

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • Which of the following is true regarding chemoautotrophs ?

    A
    Bacteria oxidise various inorganic substance only for food production.
    B
    They use chemical energy for food synthesis
    C
    They use light energy for food production
    D
    Both (1) & (2)

  • Which of the following processes is fthe source of energy in chemoautotrophs for ixation of CO_2 into carbohydrates ?

    A
    Oxidation of inorganic molecules
    B
    Oxidation of organic molecules
    C
    Reduction of organic molecules
    D
    Reduction/oxidation of any matter present in medium.

    • Similar Questions

    Explore conceptually related problems

    Where from do the chemoautotrophs derive energy for the synthesis of their food?

    What are chemoautotrophs?

    Assertion (A) : The earliest organisms that appeared on the Earth were non-green and presumably anaerobis. Reason (R ) : The first autotrophic organisms were the chemoautotrophs that never released oxygen.

    An example of chemoautotrophic bacteriaum is

    $ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The first organisms were, pherhaps the chemoautotrophs and anaerobes.

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