Where does the secretion of enzyme helicase take place?

[PainterGuy]

Hi,

I was watching the following video which described how DNA replication takes place. It discusses helicase, polymerase, primase, etc. Where do these enzyme come from? I mean what body part secretes them. I think that every cell utilizes these enzymes. I don't think that these enzymes keep floating around in each cell all the time. They must be released at a set time by something. I don't know much about biology but just curious. Thanks for the help!

 

[docnet]

They are made in the cytosol of every cell and transported into the nucleus.