Hey Aspirant ,

Yes you have to appear for SRMJEE   if you want to take BSC in Biotechnology in SRM Chennai.  Not only you need to appear for the exam you need to secure a good rank to get into SRM Chennai.  As it is the core of SRM university also one if the top private colleges in India.  Also SRM accepted scores of JEE mains,  so if you have scored enough , you can get into SRM through JEE Mains.

I hope this helps!!