Question

1. there are four nitrogenous bases found in dna. three are cytosine, adenine and guanine. what is the fourth? do not use punctuation or capitalization of letters in your answer or it will be marked as incorrect.

Explanation:

DNA contains four nitrogenous bases: cytosine, adenine, guanine, and thymine. The question asks for the fourth base, with instructions to use no punctuation or capitalization.

Answer:

thymine