A 2 year-old male is seen by his pediatrician after several bo | FreeMedSite

A 2 year-old male is seen by his pediatrician after several bouts of
diarrhea lasting 3 days now. The patient was traveling outside of the country with his parents and has just returned. The physician explains that the process is likely infectious. Part of the pathogenesis includes large-scale replication of bacteria within the patient's intestinal tract in addition to rapid proliferation of intestinal epithelial cells. An important part of prokaryote and eukaryote cellular proliferation involves DNA replication. Bidirectional DNA replication requires construction of two distinct strands of DNA, and these strands are built in both the 5'-3' and 3'-5' directions.

Which of the following is unique to the process of DNA construction in the 3'-5' direction?


A. Discontinuous DNA synthesis with subsequent linking

B. 5'-3' exonuclease activity of DNA polymerase

C. 3'-5' exonuclease activity of DNA polymerase

D. 3'-5" polymerase activity of DNA polymerase

E. RNA primer synthesis before DNA strand synthesis