The purine nitrogen bases in $DNA$ are .....

  • A
    Uracil and Guanine
  • B
    Guanine and Adenine
  • C
    Adenine and Cytosine
  • D
    None of these

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In $DNA$,how are the nucleotides linked together?

Nucleic acids exhibit secondary structure. Describe through the Watson-Crick model.

Which of the following is incorrect for $DNA$ structure?

In which part do different types of $DNA$ molecules vary?

The mean diameter of the $DNA$ double helix is:

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