Hi Maria. The eligibility for B.tech biotechnology admission through TNEA counselling depends on the aggregate score. If you have scored minimum of 50%(General), 45%(OBC) and 40%(MBC, DNC, SC, ST & STA), then you're eligible. Also, depending on the cut off marks, a merit list would be released by Anna University on the fourth week of June. The admission depends on availability of seats, number of candidates, etc.Therefore, it depends on your rank that will decide the college.