Answer to Question #65244 in Molecular Biology for Sanjukta Ghosh
The image from Lehninger represents two molecules, which are joined at the region of clamp loader. It allows their simulatnous functioning and replication of the two strands.
Dear Sanjukta Ghosh
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You might like to take a look again both the diagrams illustrate the asymmetrical dimeric DNA polymerase III with a little conformational difference.