Hello Aspirant,
No, you don't need to register separately. You just need to select the course and college from its website, as and when DU releases its each cut-off and submit the required documents. You can only apply to one college and one course in each cut-off.
You can select the course here http://www.du.ac.in/du/uploads/COVID-19/admissions.html
Hope this helps :)
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