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The wild type E. coli cells are growing ...

The wild type E. coli cells are growing in normal medium with glucose. They are transferred to a medium containing only lactose as sugar. Which of the following changes take place ?

A

The lac operon is repressed

B

All operon are induced

C

E . Coli cells stop dividing

D

The lacs operon is induced

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The correct Answer is:
D
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ARIHANT NEET-GENE, ITS EXPRESSION AND REGULATION-Chapter Exercise (A) Taking it together (Assorted questions of the Chapter for Advanced Level Practice
  1. Dr. Khorana and his colleagues synthesized an RNA molecule with repeat...

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

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  3. The wild type E. coli cells are growing in normal medium with glucose....

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  4. In an E coli cell according to the operon theory, an operator gene com...

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  5. The lac operon requires a ' helper' protein which, by binding to the p...

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  6. Which one of the following pairs is correctly matched?

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  7. During protein synthesis , the correct amino acid is brought to the ri...

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  8. Addition of lactose in a culture of E. coli induces enzymes ----------...

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  9. Practice using the dictionary of the genetic code determine the amino ...

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  10. During protein synthesis , the correct amino acid is brought to the ri...

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  11. Which among the following codon do not codes for valine (val)?

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  12. The process of translation requires

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  13. Which of the following is true about the terminator

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  14. Which of the following is true about the promoter gene?

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  15. In protein synthesis, a polypeptide of five amino acids is synthesized...

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  16. In mRNA , AUG is the initiating codons and UAA, UAG and UGA are termin...

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  17. In tryptophan synthesis pathway , tryptophan acts as a compressor . Wh...

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

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  19. Which of the following is true for RNA processing?

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  20. A DNA molecule in which both strands have radioactive thymidine is all...

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