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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 operons is induced

B

E.coil cells stop dividing

C

The lac operon is repressed

D

All operons are induced

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The correct Answer is:
A
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AAKASH INSTITUTE-MOLECULAR BASIS OF INHERITANCE -ASSIGNMENT (SECTION -C) Previous Years Questions
  1. The lac operon is an example of :

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  2. If the DNA condons are ATG ATG ATG and a cytosine base is inserted at...

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

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  4. If the sequences of bases in DNA is ATTCGATG, then the sequence of bas...

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  5. Which of the following serves as an stop codon ?

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  6. The codons causing chain termination (stop codons) are

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  7. DNA synthesis can be specifically measured by estimating the incorpora...

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  8. Which of the following step of translation does not consume a high ene...

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  9. DNA elemaets, which can switch their position , are called

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  10. Sequence of which of the following is used to know the phylogeny ?

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  11. Genes that are involved in turning on or off the transcription of set ...

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  12. In operon concept, regulator gene functions as:

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  13. In DNA, when AGCT occurs, their association as per wihich of the ...

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  14. In Drosophila, during organ differentiation, one organ can be replaced...

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  15. Method of DNA replication in which two strands of DNA separates and sy...

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  16. In negative operon

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  17. Gene and cistron words are sometimes used synonymously because

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  18. m-RNA is synthesised on DNA template in which direction : -

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  19. At the time of organogensis, genes regulate the process at different l...

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  20. A mutant strain of T4 – Bacteriophage, R-II, fails to lyse the E-Coli ...

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