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Gene regulation governing lactose Operon...

Gene regulation governing lactose Operon E. Coli that involves the Lac i gene product is

A

Feedback inhibition because excess of galactosidase can switch off transcription

B

Positive and inducible because it can be induced by lactose

C

Negative and inducible because repressor protein Prevents transcription

D

Negative and repressible because repressor protein prevents transcription

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The correct Answer is:
C
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USHA PUBLICATION-MOLECULAR BASIS OF INHERITANCE-EXERCISE
  1. Which vector can clone only a small fragment of DNA ?

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  2. Commonly used vectors for human genome sequencing are :

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  3. Gene regulation governing lactose Operon E. Coli that involves the Lac...

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  4. In sea urchin DNA , which is double stranded , 17 of the bases were sh...

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  5. Lactose ( lac ) operon is regulated by :

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  6. The enzyme peptidyl transferase of prokaryotes resides in :

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  7. The tRNA anticodon 3' - UAC - 5' will pair with the mRNA codon :

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

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

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

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

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

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

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

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

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  16. The first genetic material could be :

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  17. With regard to mature mRNA in eukaryotes :

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

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  19. Who amongst the following scientists had no contribution the developme...

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

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