Module 7 : Microbial Molecular Biology and Genetics

Lecture 5 : Regulation of Genes

 

Study Questions:

  1. 1. What do you mean by gene regulation?

    2. 2. Explain about Trp operon?

    3. Draw the structure of Trp Operon?

    4. If there is higher levels of tryptophan in meat or media, will it lead to the increase in the synthesis of trp mRNA in the cell? Justify your answer.

    5. What is repressible and inducible system? Give an example?

    6. What may be the components of the any common Operon? Can you guess?

    7. What is lac operon?

    8. Explain: lac Operon?

    9. Will higher concentration of lactose lead to repression of the lac operon?

    10. What is the difference you observe between lac and Trp operon?

    11. If you add excess of glucose in the media, lac operon will be activate dor not? Justify your answer?

    12. Think about the situation, presence of increased concentration of glucose as well as allolactose in the media leads to lac operon activation or not? Justify your answer?

    13. Draw the structure of lac operon and its action when the following conditions are prevailing in the media: increased glucose, low gloucose, higher c-AMP, low c-AMP, higher glucose and high c-AMP, low glucose and High c-AMP, Higher glucose and higher allolactose?