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Biology, 25.11.2019 23:31 diyagawande

Identify two structural features of purines and pyrimidines.

purines

__contain two heterocyclic rings.
__contain only two ring nitrogen atoms.
__contain four ring nitrogen atoms.
__contain one heterocyclic ring.
__contain only three ring nitrogen atoms.

pyrimidines

__contain one heterocyclic ring.
__contain four ring nitrogen atoms.
__contain only three ring nitrogen atoms.
__contain two heterocyclic rings.
__contain only two ring nitrogen atoms.

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Identify two structural features of purines and pyrimidines.

purines

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