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Which of the following types of DNA Polymerases (which are all found in Prokaryotes) can also be found in Eukaryotes?

I. DNA Polymerase I
II. DNA Polymerase II
III. DNA Polymerase III

(A) I only
(B) II only
(C) I and III only
(D) I, II and III

1 Answer

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Final answer:

In prokaryotes, DNA polymerase I functions similarly to RNase H in eukaryotes, while DNA polymerase III has no directly named eukaryotic counterpart, making DNA polymerase I the only polymerase with a comparable eukaryotic enzyme even though it is structurally different.

Step-by-step explanation:

The question asks which types of DNA Polymerases found in prokaryotes can also be found in eukaryotes. In prokaryotes, DNA polymerase III carries out strand elongation. Meanwhile, in eukaryotes, these functions are performed by DNA polymerase delta and epsilon, known as pol δ and pol ɛ, respectively. DNA polymerase I acts as a primer remover in prokaryotes, but its eukaryotic counterpart is RNase H.

Therefore, we can determine that none of the prokaryotic DNA polymerases are structurally similar to those in eukaryotes, even though they may carry out comparable functions. Hence, the correct answer to the question is (A) I only, as DNA polymerase I in prokaryotes has a role functionally equivalent to an enzyme in eukaryotes (though it is structurally different), while the others do not have counterparts with the same name in eukaryotes.

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