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How does repressor protein prevent the t...

How does repressor protein prevent the transcription of structural genes ?

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Repressor protein binds to the operator region of the operon and prevents RNA polymerase from transcribing the operon .
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How does repressor protein prevent the transcription of strutural genes?

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Study the figure given below and answer the questions: (i) How does the repressor molecule get inactivated? (ii) When does the transcription of lac mRNA stop? (iii) Name the enzyme transcribed by the gene Z'.

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OSWAAL PUBLICATION-MOLECULAR BASIS OF INHERITANCE -TOPIC-2: Multiple Choice Questions
  1. How does repressor protein prevent the transcription of structural gen...

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  2. In a DNA strand the nucleotides are linked together by :

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  3. A nucleoside differs from a nucleotide . It lacks the :

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  4. Both deoxyribose and ribose belong to a class of sugars called :

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  5. The fact that a purine base always paired through hydrogen bonds with ...

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  6. The net electric charge on DNA and histones is :

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  7. The promoter site and the terminator site for transcription are locate...

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  8. Which of the following statements is the most appropriate for sickle c...

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  9. One of the following is true with respect to AUG:

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  10. The first genetic material could be:

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  11. With regard to mature mRNA in eukaryotes :

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  12. The human chromosome with the highest and least number of genes in the...

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

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

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  15. Discontinuous synthesis of DNA occurs in one strand, because :

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

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  17. Control of gene expression takes place at the level of:

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

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

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  20. Which of the following are the functions of RNA?

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

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