In E.coli,there is a mutation in a gene called dnaB that alters the helicase that normally acts at the origin of replication.Which of the following events would you expect to occur as a result of this mutation?
A)No proofreading will occur.
B)The DNA strands at the origin of replication will separate,but replication will not progress.
C)The DNA will supercoil.
D)DNA polymerase I will not function correctly.

Question

Quizplus · Accepted Answer

The helicase is responsible for unwinding the DNA strands at the origin of replication, allowing replication to occur. If the helicase is altered due to the mutation in dnaB, the DNA strands will still separate but replication will not progress because the replication machinery will not be able to move along the DNA strands.

In EColi,there Is a Mutation in a Gene Called DnaB That