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Purines possess nitrogen at :...

Purines possess nitrogen at :

A

1 , 2 , 4 and 6 position

B

1 , 3 , 5 and 7 position

C

1, 3 , 7 and 9 position

D

1, 2, 6 and 8 position

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The correct Answer is:
C
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USHA PUBLICATION-MOLECULAR BASIS OF INHERITANCE-EXERCISE
  1. In Lac operon , i gene codes for :

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  2. Which one of the following has dual functions ? It codes for methionin...

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  3. Purines possess nitrogen at :

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  4. Mobile genetic sequence are called :

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  5. The portion of DNA which contains information for an entire polypeptid...

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  6. The place where RNA - polymerase attaches with the DNA is called :

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  7. RNA directs the building of proteins through a sequence of :

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  8. Choose the correct option : 1) Six codons do not code for any amino ac...

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  9. The unequivocal proof of DNA as the genetic material came from the stu...

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  10. DNA contains nucleobasės , sugars and phosphate . Removal of which amo...

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  11. Removal of introns and joining the exons in a definite order in a tran...

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  12. The enzyme referred to as Kornberg enzyme is

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  13. Which one of the following is not a part of a transcription unit in DN...

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  14. Which enzyme joins DNA fragments ?

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  15. A single strand of nucleic acid tagged with a radioactive molecule is ...

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  16. Which one is a true statement regarding DNA polymerase used in PCR ?

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  17. If one strand of DNA has the nitrogenous base sequence as ATCTG , what...

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  18. What is it that forms the basis of DNA fingerprinting ?

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  19. DNA fragments generated by the restriction endonucleases in a chemical...

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  20. Which enzymes will be produced in a cell in which there is a nonsense ...

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