Which of the following statements concerning DNA polymerase III (Pol III) of E.

Question

Which of the following statements concerning DNA polymerase III (Pol III) of E. coli is correct? A.) Pol III is a component of the primosome. B.) The core catalytic activity of Pol III includes 5’ -3’ exonuclease activity. C.) Two copies of the Pol III catalytic core are present in a single replisome. D.) Pol III functions only in DNA repair.

A chemical mutagen converts C to U. What type of mutations could this cause in the DNA? A.) None, since DNA does not contain uracil. B.) Non-sense mutations. C.) Mis-sense mutations. D.) Frame-shift mutations. E.) B or C is correct.

Explanation / Answer

Which of the following statements concerning DNA polymerase III (Pol III) of E. coli is correct.

The correct answer is option C that is Two copies of the Pol III catalytic core are present in a single replisome.

2) The correct answer is option A that is None, since dna does not contain uracil. Repair system removes Uracil and that is replaced by cytosine.

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