Question

Nitrogen is contained in which of the following?

a. adenine.
b. cytosine.
c. guanine.
d. thymine. d. uracil.

Answer 1

DNA contains four nitrogen bases: adenine, thiamine, guanine and cytosine. Adenine and thymine pair, and guanine and cytosine pair.

Step-by-step explanation:

In combination, nitrogen is found in the rain and soil as ammonia and ammonium salts and in seawater as ammonium (NH4+), nitrite (NO2−), and nitrate (NO3−) ions...