Place the following events in the correct order as they occur on the lagging strand:1. Helix unwinding2. DNA polymerase III builds DNA3. DNA polymerase I acts4. Ligase glues Okazaki fragments together5. RNA primase builds RNA primers

1, 5, 2, 3, 4

Explanation:

There are several enzymes involved in DNA replication and the step by step process of replication along with enzymes involved is as follows  

a)Helicase is the first enzyme to act and it has a very important role in replication. Helicase unwinds the double helix of DNA

b)Single strands binding proteins  prevent reattachment of  DNA helix

c)Topoisomerase is responsible for relieving or inducing supercoils

d)The primase then lay the starting blocks made from RNA

e)DNA polymerase enzyme III lay the DNA from 5 prime to 3 prime.  

f)DNA polymerase enzyme I then do half ladder replication

g)   DNA Ligase links all the fragments.  

Hence, the correct sequence is 1, 5, 2, 3, 4