Home
Class 12
BIOLOGY
In E.coli, the lac operon gets switched ...

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

A

lactose is present and it binds to the repressor

B

repressor binds to operator

C

RNA polymerase binds to the operator

D

lactose is present and it binds to RNA polymerase.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MOLECULAR BASIS OF INHERITANCE

    MBD|Exercise Exercise |20 Videos

  • MODEL TEST PAPER -3

    MBD|Exercise EXERCISE|51 Videos

  • ORGANISMS AND ENVIRONMENT

    MBD|Exercise EXERCISE|13 Videos

Similar Questions

Explore conceptually related problems

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

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

What is inducer in the lac operon? How does it ensure the "switching on" or of genes?

Fill in the blanks: When current is switched 'on' in a room heater,it_______

An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes. If the two coils are connected in series, find the time taken to boil the water in the kettle.

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

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?

MBD-MOLECULAR BASIS OF INHERITANCE-Exercise
  1. To initate translation, the mRNA first binds to :

    Text Solution

    |

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

    Text Solution

    |

  3. What is Human genome project ? Briefly write about the salient feature...

    Text Solution

    |

  4. Differentiate between monocistronic and polycistronic transcription un...

    Text Solution

    |

  5. Where and when does replication occur?

    Text Solution

    |

  6. What is meant by term gene expression?

    Text Solution

    |

  7. Differentiate induction and repression.

    Text Solution

    |

  8. Sketch a "Clover Leaf Model of RNA". Write its role in translation.

    Text Solution

    |

  9. Name the enzymes involved during replication of DNA

    Text Solution

    |

  10. Name the enzymes involved during transcription of RNA.

    Text Solution

    |

  11. Discuss the mechanism of transduction as illustrated by Hershey and Ch...

    Text Solution

    |

  12. Comment on the utility of variability in the number of tandem repeats ...

    Text Solution

    |

  13. Write pair of contrasting characters of:

    Text Solution

    |

  14. Name the type of inheritance in which genotype ratio is same as phenot...

    Text Solution

    |

  15. Name the 6 biogeographical realms?

    Text Solution

    |

  16. Draw a schematic representation of the structure of a transscription u...

    Text Solution

    |

  17. Draw a schematic representation of the structure of a transscription u...

    Text Solution

    |

  18. Draw a schematic representation of the structure of a transscription u...

    Text Solution

    |

  19. Draw a schematic representation of the structure of a transscription u...

    Text Solution

    |

  20. Mention the function of promoter gene in transcription.

    Text Solution

    |