Question

If the rate of replication in a particular prokaryote is 900 nucleotides per second, how long would it take 1.2 million base pair genomes to make two copies?

Short answer

22.2 minutes, or 1333 seconds.

Step-by-step solution

Introduction 

Prokaryotic DNA is circular in form, with one origin from which replication proceeds. It is semi-conservative and bidirectional. Like eukaryotes, prokaryotes have double-stranded DNA that unwinds at a replication fork to start the replication process. Prokaryotes replicate using three fundamental steps. Initiation, elongation, and termination are their names.

The explanation for the answer. 

Replication can happen in the prokaryotic bacterium E. coli at a pace of 1,000 nucleotides per second. Human eukaryotic DNA duplicates at a rate of 50 nucleotides per second, in contrast. So, the answer is 22.2 minutes or 1333 seconds.