In the Synthesis of DNA in Escherichia Coli

Multiple Choice

In the synthesis of DNA in Escherichia coli

A) a single-strand nick in the template DNA gives rise to a swivel point just in advance of the replication fork
B) Mn²⁺ is required
C) all enzymes involved are single polypeptide chains
D) neither the template DNA nor the daughter DNA molecules exhibit supercoiling