Respuesta :

Photon
Adenine (A) binds with Thymine (T).
Guanine (G) binds with Cytosine (C).


Adenine and Guanine are purines. Thymine and Cytosine are pyrimidines.

Hope this helps !

Photon
There are 4 different nitrogenous that are complementary to each other:

1) thymine (T)

2) guanine (G)

3) cytosine (C)

4) adenine (A) 

~Happy Studying!

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