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You are repeating the Hershey-Chase expe...

You are repeating the Hershey-Chase experiment and are provided with two isotopes : `""_(32)`P and `""_(15)`N (in place of `""_(35)`S in the original experiment). How do you expect your results to be different?

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Use of `""_(15)`N will be inappropriate because method of detection of `""_(35)P` and `""_(15) N` is different (`""_(32)P` being a radioactive isotope while `""_(15)`N is not radioactive but is the heavier isotope of Nitrogen). Even if `""_(15)`N was radioactive thenits presence would have been detected both inside the cell (`""_(15)`N incorporated as nitrogenous base in DNA) as well as in the supernatant because `""_(15)`N would also get incorporated in amino group of amino acids in proteins). Hence the use of `""_(15)`N would not give any conclusive results.
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OSWAAL PUBLICATION-MOLECULAR BASIS OF INHERITANCE -TOPIC-1: Short Answer Type Questions-II
  1. Describe! briefly the Watson and Crick model of DNA.

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  2. Describe the Semiconservative method of DNA replication.

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  3. You are repeating the Hershey-Chase experiment and are provided with t...

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  4. What background information did Watson and Crick have made available f...

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  5. How did Hershey and Chase prove that DNA is the hereditary material?

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  6. How did Griffith explain the transformation of R-strain (non-virulent)...

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  7. Explain how Macleod, Mc Carty and Avery determined the biochemical nat...

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  8. Explain the post transcriptional events in eukaryotes.

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  9. Give reasons for (i) Both strands of DNA are not copied during trans...

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  10. Differentiate between the process of transcription in prokaryotes and ...

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  11. Draw a labelled schematic sketch of replication fork of DNA. Explain t...

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  12. (a) Draw a schematic representation of the structure of a transcriptio...

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  13. Describe the initiation process of transcription in bacteria.

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  14. Who revealed biochemical nature of transforming principle ? How was it...

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  15. The base sequence in one of the strands of DNA is TAGTCATGAT Give th...

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  16. The base sequence in one of the strands of DNA is TAGTCATGAT How are...

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  17. The base sequence in one of the strands of DNA is TAGTCATGAT Explain...

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  18. How is nucleosome formed? Draw a diagram of the nucleosome.

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  19. Define the terms splicing, capping and tailing.

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  20. Where and when does replication occur?

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