if I score something around 550 in NEET , can I get admission to IIsc , Bangalore directly?

Hey, even I had that idea, and wanted to join iisc, I also started filling up the form, but during choosing the subject through which I'm going to pass, mathematics was mandatory, I'm bipc student i.e biology, physics and chemistry. So I couldn't go further, I tried many times, the results were same. If you wish, try once again. Best of luck.

You can apply for the admission through your NEET score but you will have to fill up a separate application form for the same. As candidates will be shortlisted on the basis of their performance in the KVPY, JEE Main or JEE Advanced and NEET. A separate merit list for the candidates will be prepared on the basis of the scores obtained in the KVPY or JEE Main 2017 or JEE Advanced 2017 or NEET examinations. Seats will be allotted on the basis of the merit lists and seats available. The documents of the candidates will be verified before admissions.

Hope this helps!!!