On which template strand of $DNA$ does continuous replication occur?

Define the following terms:
$1.$ Template strand
$2.$ Semi-conservative replication

Which one statement regarding "Okazaki fragments" is correct?

Which of the following statements is correct regarding the process of replication in $E. coli$?

Given below are the two statements.
Statement $I$: In prokaryotes,there is only one replicon,however,in eukaryotes,there are several replicons in tandem.
Statement $II$: The two separated strands in a replicon of $DNA$ are prevented from rejoining by helicase enzyme.
In the light of the above statements,choose the correct answer from the options given below.

When $DNA$ replication starts,