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 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

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • NCERT Exemplar Questions +2 (MICROBES IN HUMAN WELFARE)

    TRUEMAN BIOLOGY|Exercise MCQs|16 Videos
  • NCERT Exemplar Questions +2 (ORGANISMS AND POPULATIONS)

    TRUEMAN BIOLOGY|Exercise MCQs|20 Videos

Similar Questions

Explore conceptually related problems

In E.coli, the lac operono gets switched on when

the lac operonof E. coli gets switchedon when

Lac operon is

Name the genes that constitute an operon. How does lac operon get switched on in the presence of lactose?

In E.coli, lac operon is induced by

The lac operon consists of

Lac operon is related with :

The lac operon consists of :

TRUEMAN BIOLOGY-NCERT Exemplar Questions +2 (MOLECULAR BASIS OF INHERITANCE)-MCQs
  1. The first genetic material could be

    Text Solution

    |

  2. With regard to mature mRNA in eukaryotes

    Text Solution

    |

  3. The human chromosomes with the highest and least number of genes in th...

    Text Solution

    |

  4. Who amongst the following scientists had no contribution in the develo...

    Text Solution

    |

  5. DNA is a polymer of nucleotides which are linked to each other by 3'-5...

    Text Solution

    |

  6. Discontinuous synthesis of DNA occurs in one strand, because

    Text Solution

    |

  7. Which of the following steps in transcription is catalysed by RNA poly...

    Text Solution

    |

  8. Control of gene experssion takes place at the level of

    Text Solution

    |

  9. Regulatory proteins are the accessory proteins that interact with RNA ...

    Text Solution

    |

  10. Which was the last human chromosome to be completely sequenced ?

    Text Solution

    |

  11. Which of the following are the functions of RNA

    Text Solution

    |

  12. While analysing the DNA of an organism a total number of 5386 nucleoti...

    Text Solution

    |

  13. In some viruses, DNA is synthesised by using RNA as template. Such a D...

    Text Solution

    |

  14. If Meselson and Stahl's experiment is continued for four generations i...

    Text Solution

    |

  15. If the sequence of nitrogen bases of the coding strand of DNA in a tra...

    Text Solution

    |

  16. The RNA polymerase holoenzyme transcribes

    Text Solution

    |

  17. If the base sequence of a codon in mRNA is 5'-AUG-3', the sequence of ...

    Text Solution

    |

  18. The amino acid attaches to the tRNA at its

    Text Solution

    |

  19. To initiate translation, the mRNA first binds to :

    Text Solution

    |

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

    Text Solution

    |