Nucleic Acids: Sugars & Bases
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DNA Structure
Q. Which of the following statements about nitrogenous bases is incorrect?
a
There is one more carbon atom in thymine than in uracil.
b
The purine base double ring contains 5 nitrogen atoms.
c
The pyrimidine base ring contains 2 nitrogen atoms.
d
Purines have 4 double bonds.
e
Pyrimidines have 3 double bonds.
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