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Kaplan Qbank USMLE



Author3 Posts
  #1

Sugar are attached to nitrogen containing bases in nucleotides by:
1. hydrogen bonds
2. N- glycosidic bonds
3. phosphodiester bonds
4. electrostatic interactions
5. stacking inter.

  #2

The answer is 2.N- glycosidic bonds[font color="#000000"].[/font]

It cannot be,

answer 4 and 5 at all.

answer 1.Hydrogen bonds : DNA strands are made by hydrogen bonds between the bases,hold the chains together.

answer 3.as phospho di ester bonds link two nucleotides together.


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  #3

2

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