DNA polymerase III can synthesize new DNA at a rate of 1000 bases per second. The genome of Escherichia coli is about 4,600,000 base pairs in length. How long should it take to replicate the E. coli genome

1.27 hour or 77 minutes.

Explanation:

In the given question it is provided that:

1. DNA polymerase III synthesizes new DNA at a rate of- 1000 bases/sec

2. The genome of E.coli has- 4,600,000 base pairs

To calculate the time required for replication:

Total base pairs/ speed of enzyme

= 4600000/1000

= 4600 seconds

= 4600/3600   (1 hour= 3600 seconds)

= 1.27 hour or 77 minutes.

Thus, 1.27 hour or 77 minutes is correct.