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Write the different components of a lac ...

Write the different components of a lac - operon in E . Coli Explain its expression while in an 'open' state.

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Lac operon in E.coil, is induced by

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What is an operon ? Explain the functioning of lac operon when in an open state.

How are the structural genes inactivated in lac operon in E. Coli? Explain.

Which one of the following is not a component of lac operon model ?

Enzyme transacetylase produced by lac operon in E.coli

Given above is the schematic representation of lac operon of E.coli. Explain the functioning of this operon when lactose is provided in the growth medium of the bacteria.

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(a) Absence of lactose in the culture medium affects the expression of a lac-operon in E.coli. Why and how ? Explain. (b) Write any two ways in which the gene expression is regulated in eukaryotes.

Match the components of lac-operon of Escherichia coli ad find out the correct combination.

XII BOARDS PREVIOUS YEAR-XII BOARDS-Section -D
  1. (a) Draw a diagrammatic sketch of a transverse section of an anther o...

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  2. (a) Why does DNA replication occur in small replication forks and not...

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  3. Write the different components of a lac - operon in E . Coli Explain i...

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  4. (a) The graph given below represents the organisms response to temper...

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  5. Draw the pyramids of biomass in sea and in a forest. Explain giving re...

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  6. Describe the roles of heat , primers and the bacterium <i>Thermus aqua...

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  7. Explain the steps involved in the production of genetically engineered...

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  8. (a) " Organisms may be conformers or regulators . " Explain this stat...

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  9. Describe the onter - relationship between productivity , gross primary...

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  10. A national newspaper reported that a 50 metre high 'Sanitary landfill...

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  11. (a) Draw a diagram of the adult human female reproductive system and l...

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  12. (a) Draw a diagrammmatic sketch of a transverse section of an anther ...

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  13. (a) Why does DNA replication occur in small replication forks and not...

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  14. What is an operon ? Explain the functioning of lac operon when in an o...

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  15. (a) The graph given below represents the organisms response to temper...

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  16. Draw the pyramids of biomass in sea and in a forest. Explain giving re...

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    |

  17. Describe the roles of heat , primers and the bacterium Thermus aquatic...

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    |

  18. Explain the various steps involved in the production of artificial ins...

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  19. (a) " Oraganisms may be conformers or regulators . " Explain this sta...

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  20. Describe the onter - relationship between productivity , gross primary...

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