My question is iam a bsc botany and biotechnology student and iam interested to study mtech biotech engineering can i purse mtech after bsc

No, you can not do the M.Tech Biotechnology on the basis of B.Sc. Botany and Biotechnology. The basic eligibility criteria of M.Tech Biotechnology is B.Tech Biotechnology or M.Sc. In Biotechnology. GATE is another important requirement for pursuing the M.Tech courses.