Firstly, you need to pursue your current course very seriously with good grades and if possible a couple of projects or research internships in your field of interest. In the final year of study in B.Sc Biotechnology, you should give GRE Exam followed by IELTS/TOEFL. Following this, you need to make a list of Target institutes in countries of your choice, followed by submitting application consisting of SOP, Exam Scores, Recommendation Letters and Resume, preferably within first deadline with the application fee. For more information do follow the link below

https://www.careers360.com/articles/study-abroad-countries-courses-tests-visas-more