Home
Class 11
BIOLOGY
Which of the following statements is inc...

Which of the following statements is incorrect?

A

Pathogenic bacteria cause 90% of human diseases.

B

A large number of antiboitics are produced by actinomycets (e.g. Streplomyces), which are a class of fungi.

C

`N_(2)`. fixing bacteria pick up free `N_(2)` from soil atmosphere and convert it into nitrogenous compounds.

D

Archaebacteria differ from other bacteria in having a different cell wall structure and this feature is responsible for their suvival in extreme conditions.

Text Solution

Verified by Experts

The correct Answer is:
D

Maximum number of antibiotics are produced by mycelial bacteria known as actinomycetes, e.g., Streptomycin - Streptomyces griseus, Chloromycetin or chloramphenicol - Streptomyces venezuelae and S. lavendulae.
Promotional Banner

Topper's Solved these Questions

  • ANIMAL KINGDOM

    NCERT FINGERTIPS|Exercise Animal Kingdom|148 Videos
  • BIOMOLECULES

    NCERT FINGERTIPS|Exercise Biomolecules|137 Videos
NCERT FINGERTIPS-BIOLOGICAL CLASSIFICATION-Biological Classification
  1. Which one of the following is an incorrect statement regarding mycopla...

    Text Solution

    |

  2. Read the following statements and select the correct option Statemen...

    Text Solution

    |

  3. Which of the following statements is incorrect?

    Text Solution

    |

  4. Which of the following kingdoms has no well defined boundaries?

    Text Solution

    |

  5. Which of the following organisms have been placed under kingdom Protis...

    Text Solution

    |

  6. Members of kingdom Protista are primarily

    Text Solution

    |

  7. The kingdom Protista forms a link with kingdom

    Text Solution

    |

  8. Which of the following options incorrectly distinguishes the kingdoms ...

    Text Solution

    |

  9. Which of the following groups of organisms are included under chrysoph...

    Text Solution

    |

  10. Chrysophytes are

    Text Solution

    |

  11. The cell wall is composed of two thin overlapping shells which fit tog...

    Text Solution

    |

  12. Siliceous frustules of diatoms being indestructible, piled up at the b...

    Text Solution

    |

  13. Diatomaceous earth is used for all except

    Text Solution

    |

  14. Dinoflagellates are mostly

    Text Solution

    |

  15. A slide under microscope shows following features: (i) Unicellular ...

    Text Solution

    |

  16. Which group of organisms is represented by the given figure?

    Text Solution

    |

  17. Red tides in warm coastal water develop due to the abundance of

    Text Solution

    |

  18. Read the following statements regarding euglenoids and select the inc...

    Text Solution

    |

  19. The given statements describe a group of organisms. (i) Instead of...

    Text Solution

    |

  20. Study the given figure showing structure of Euglena and select the opt...

    Text Solution

    |