Home
Class 12
BIOLOGY
What is an operon? Describe the componen...

What is an operon? Describe the components of Lac operon in E. coil and mention how it switches on and off in the presence and absence of lactose respectively?

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Show the components of lac operon.

Name the inducer of lac operon in E-coli.

In E.coli, the lac operon gets switched on when :

Can you think, for how long would the lac operon be expressed in the presence of lactose?

Explain how lac operon operates in E.coli in the absence of an inducer.

What is an inducible operon ? Name the genes that constitute an operon. Explain the lac operon of E.Coli with help of schematic representation.

Which of the following switch off lac operon?

What is regulation of gene expression? Explain with the help of the lac operon of E.Coli.

MBD-ECOLUTION-EXERCISE
  1. Why is DNA molecule more stable genetic material than RNA? Explain.

    Text Solution

    |

  2. Differentiate between homologous and analogous organs

    Text Solution

    |

  3. A tRNA is charged with amino acid and methionine:

    Text Solution

    |

  4. Define male heterogamy. Give an example of organism showing female het...

    Text Solution

    |

  5. Peripatus is a connecting link between?

    Text Solution

    |

  6. List any four major goals of Human Genome project.

    Text Solution

    |

  7. Describe Lamarack's theory of evolution, with a suitable example.

    Text Solution

    |

  8. What is a test cross? Show a monohybrid test cross using a Punnet squa...

    Text Solution

    |

  9. Two Antirrhinum plants, one with red flowers and the other with white ...

    Text Solution

    |

  10. Describe the mechanism of patter of inheritance of ABO blood groups in...

    Text Solution

    |

  11. Human blood groups are genetically inherited. In a family A,B, AB, O b...

    Text Solution

    |

  12. Human blood groups are genetically inherited. In a family A,B, AB, O b...

    Text Solution

    |

  13. Among the five factors that are known of effect Hardy-Weinberg equilib...

    Text Solution

    |

  14. Describve the three different methods in which natural selection can p...

    Text Solution

    |

  15. Name the common ancestor of ferns, horsetails and gymnosperms.

    Text Solution

    |

  16. What is an operon? Describe the components of Lac operon in E. coil an...

    Text Solution

    |

  17. ExplainHershey and Chase experiment to prove that DNA is the hereditar...

    Text Solution

    |

  18. Write the scientific name of the organism that Morgan used for his ex...

    Text Solution

    |

  19. Mention any four characteristic symptoms of the Down's syndrone affect...

    Text Solution

    |

  20. Explain in brief about the procedure of DNA fingerprinting.

    Text Solution

    |