Home
Class 12
BIOLOGY
The lac operon consists of...

The lac operon consists of

A

Four regulartory genes only

B

One regulatory gene and two structural genes

C

Three regulatroy genes and two structural genes

D

Three regualatory genes and three structural genes

Text Solution

Verified by Experts

The correct Answer is:
b
b) Regulatory gene = 'I', structural genes - z,y,a
Promotional Banner

Topper's Solved these Questions

  • MICROBES IN HUMAN WELFARE

    ERRORLESS |Exercise Microbes In Human Welfare|118 Videos

  • PRINCIPLES OF INHERITANCE AND VARIATION

    ERRORLESS |Exercise Principles Of Inheritance And Variation|716 Videos

Similar Questions

Explore conceptually related problems

Assertion (A): Lactose is the substrate for the enzyme beta-galactosidase and it regulates switching on and off of the lac operon. Reason ( R): The lac operon consists of one regulatory gene and three structural genes.

Here are some correct and some wrong statements. Correct only those statements which are wrong: (a) The genetic code is universal. (b) The genetic code is ambiguous. (c) The genetic code is regenerate. (d) Transfer RNA (tRNA) carry amino acids to mRNA codons and used again and again in transcription. (e) UAA, UAG and UGA are terminator codon. (f) Lac operon consists of regulatory genes, operator gene, structural and promoter gene.

Lac operon is

The lac operon is turned on when allolactose molecules bind to

The lac operon is an example of :

In the following diagram of the lac operon, which is an operon for inducible enzymes , identify the components and enzymes.

In lac operon, lactose acts are

ERRORLESS -MOLECULAR BASIS OF INHERITANCE-Molecular Basis Of Inheritance
  1. Select the correct bases of DNA,RNA and amino acid of beta chain resul...

    Text Solution

    |

  2. Which of the following amino acid has hydroxyl methyl gruop as its gr...

    Text Solution

    |

  3. The lac operon consists of

    Text Solution

    |

  4. Which one is diaminodiacrboxlic amino acid

    Text Solution

    |

  5. Whihc one of the following statement is not correct

    Text Solution

    |

  6. Select the two statements out of the four (A-D) given below about lac ...

    Text Solution

    |

  7. The one aspect whihc ins not a salient feature of genetic code, is its...

    Text Solution

    |

  8. How many effective codons are there for the synthesis of twenty amino ...

    Text Solution

    |

  9. Dr. Hargovind Khorana deuced the code for which of the following amino...

    Text Solution

    |

  10. Given below is a sample of a portion of DNA strand giving the base seq...

    Text Solution

    |

  11. The inducer for switching 'on' the lac operon in bacteria is

    Text Solution

    |

  12. Operon contains

    Text Solution

    |

  13. Which enzyme/s will be produced in a cell in which there is a nonsese ...

    Text Solution

    |

  14. In ans inclucible operon, the genes are

    Text Solution

    |

  15. The figure of the lac from E. coli is shown below. Each alphabets indi...

    Text Solution

    |

  16. In the given figure of the lac operon,an for inducible enzymes, Identi...

    Text Solution

    |

  17. The following figure refers to transcirption in prokaryote Identify A,...

    Text Solution

    |

  18. The given figure refers to the process of transcription in Eukaryotes,...

    Text Solution

    |

  19. Which one of the following is wrongly matched

    Text Solution

    |

  20. In lac- opeon if mutation occurs in the middle gene of the 'structural...

    Text Solution

    |