Which base are present in the dna of the plant? the mammal? the bacterium? are the same bases present in all three cases? are the bases in the same order?

The nitrogen bases that exist on every DNA sample are adenine, thymine, cytosine and guanine, or A, T, C and G, respectively. The same bases are, therefore, present in all three individuals. They aren't presented in the same order, being this the fact that tells plants, mammals and bacterium apart. The structure is always the same, but the sequence is what makes every individual different from each other.

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