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In E.coli, there enzymes galactosidase, ...

In E.coli, there enzymes galactosidase, permease and transacetylase are produced in the presence of lactose. Explain why the enzymes are not synthesized in the absence of lactose.

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SARAS PUBLICATION-MOLECULAR GENETICS -EXERCISE
  1. In E.coli, there enzymes galactosidase, permease and transacetylase ar...

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  2. Hershey and Chase experiment with bacteriophage showed that

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  3. DNA and RNA are similar with respect to

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  4. A mRNA molecule is produced by

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  5. The total number of nitrogenous bases in human genome is estimated to ...

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  6. E. coli cell grown on ""^(15)N medium are transferred to ""^(14)N medi...

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  7. What is the basis for the difference in the synthesis of the leading a...

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  8. Which of the following is the correct sequence of event with reference...

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  9. Which of the following statements about DNA replication is not correct...

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  10. Which of the following statements is not true about DNA replication in...

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  11. The first codon to be deciphered was "" which codes for "".

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  12. Meselson and Stahl's experiment proved …………………

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  13. Ribosomes are composed of two subunits, the smaller subunit of a ribos...

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  14. An operon is a:

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  15. When lactose is present in the culture medium:

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  16. Who coined the term 'gene'?

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  17. Radiocative isotopes used in Hershey and Chase experiment.

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  18. Who proposed one gene-one enzyme hypothesis?

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  19. Name the person who isolated nucleic acid from cell nuclei

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  20. Who introduced the classical concept of gene?

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  21. Nucleotide is composed of

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