sir,in june 2013 i will complete my b. tech biotech...what should i do after this..i want to go in reserch field..i do not want to do m.tech

Without more and more indepth knowledge you can't be a good research scholar. Moreover, qualification upgradation is a plus point in case of research scholars. Perhaps, you don't know that many are there who are in researches after their Ph Ds and those are called Post Doctoral Research Scholars. Yo

write GATE exam and you can get admission in some institutes like indian mathematical institute-chennai homibhabha national istitute-mumbai or write CSIR-NET or JEST exam your sure eligible to write those exams and most of the top research institutes accept this score along personal interview