Nevermind:
The answer is...

chmod 755 ./*

I didn't notice read and execute was the same as access.

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The below is the original thread
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I'm trying to change all the folders in /root/mock_iso/ to

owner = root
folder access = create and delete files

group = root
folder access = read only


others
folder access = read only

I tried

chmod 0644 ./mock_iso/*
chmod 0644 ./mock_iso/*/*
chmod 0644 ./mock_iso/*/*/*
chmod 0644 ./mock_iso/*/*/*/*

and stuff like that, but none of it worked...

How do I change all of the permissions of all of the subfolders inside a folder?

I tried this, too.

root@linux:~/mock_iso# chmod -r 0644 ./*
chmod: cannot access `0644': No such file or directory