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The inducer for switching 'on' the lac o...

The inducer for switching 'on' the lac operon in bacteria is

A

Presence of lactose

B

Number of bacteria

C

Presence of structural genes in the bacteria

D

Presence of sucrose

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The correct Answer is:
A
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MODERN PUBLICATION-MOLECULAR BASIS OF INHERITANCE -COMPETITION FILE OBJECTIVE TYPE QUESTIONS (Multiple Choice Questions (MCQs) :)
  1. Which one the following statements are correct ? (i) RNA polymerase ...

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  2. In Hershey and Chase experiments , radioactive .^(32)P was used to cul...

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  3. The inducer for switching 'on' the lac operon in bacteria is

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  4. Select the incorrect statement (s) : 1. Six codons do not code for ...

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  5. The haploid content of human DNA is

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  6. During transcription, DNA site at which RNA polymerase binds is called

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  7. In a double stranded DNA molecule , the percentage of cytosine is 18. ...

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  8. DNA contains nucleobases, sugar and phosphate. Removal of which among ...

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  9. The number of codons that code different amino acids is

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  10. Some amino acids are coded by more than one codon

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  11. Out of 64 codons, the number of codons with GGGis

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  12. The genetic material of a virioid is :

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  13. Which among the following codons not have t-RNAs ?

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  14. In lac operon , the genes a, I, y and z code respectively for

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  15. In humans most number of genes are located on chromosome

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  16. The codon which has dual function is Or polypeptide synthesis in p...

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  17. The enzyme required to catayze the polymerzatio of deoxynucleotides is

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  18. To which of the following factors, RNA polymerase binds transiently to...

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  19. Read the following statements and choose the correct option. A. Nitr...

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  20. Select the correct statement regarding protein synthesis :

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