B.Tech Biotechnology

Yes, you are eligible for that.

PCB stream students are eligible to take admission in biotechnology. But for B Tech degree, one needs to have maths alongwith PCB. Admission procedure is same in all B.Tech courses.

First, you should decide whether you want to go in private or government. If government, then it will not be so expensive. That will cost around 1 lakh (lodging + fooding). If private, it depends on college, but I will give you an idea that, it will less than equal to 2.5 lakhs per year including with your lodging + fooding. Go ahead because Biotechnology is our future. In coming days, you can do a lot with it.

Physics is a base of engineering. If you don't like physics. And go for arts and commerce.

No, it is not necessary to do Maths, but it will be difficult for you without Maths in B.Tech.

There are over 7 B.Tech in biotechnology engineering colleges in Andhra Pradesh. Please refer to the link provided below for a detailed list of colleges which offer admission in B.Tech biotechnology courses from Andhra Pradesh. Regards.
https://www.shiksha.com/b-tech/colleges/b-tech-in-biotechnology-engineering-colleges-andhra-pradesh

Eligibility
Qualification: 12th
Additional Details
Mandatory Subjects: Mathematics, Physics, Chemistry
Admission Process
Admission is through Tamil Nadu Engineering Admissions (TNEA) counseling guidelines based on marks obtained in class 12th final examination.

Guru Gobind Singh Indraprastha University (GGSIPU) conducts IPU CET for admissions to its various UG and PG level programme. IPUCET 2018 exam dates will be announced soon. The exam in 2017 for B.Tech programme was conducted on May 20.
IPU CET 2018 Syllabus
IPU CET Syllabus 2018 will comprise topics from CBSE syllabus of Class 11 & 12.