Let me take up your questions one by one and answer them..
1. First you must know the subtle difference between a MS and M.Tech. There is no M.Tech degree abroad and only MS/ME is offered after four years of BS degree. Both are similar professional qualifications, but there lies a subtle difference especially in India as these days many universities including IITs started offering MS program in addition to M.Tech program. In M.Tech, there will be equal emphasis on course work and Research work (project), interms of credit distribution, course load and time allocation. On the other hand, There will be more emphasis on Practical(lab) and Thesis work in MS and students will take very less courses. (Of 96 credits, Credit distribution for Course work and Project in M.Tech is 48+48, while in MS it is 20+76).
2. GATE- This examination will make you Eligible
(a) For a Master's program in Indian Institutes and Universities (MS/M.Tech)
(b) Also for a PhD program (in many Institutes like IITs, labs under CSIR and DBT like CCMB etc, and some other Universities, If GATE score is outstanding)
(c) some Universities abroad like National University of Singapore (Ranked 12th best University in the world) also consider GATE scores for admission into their Masters and Doctoral programs in Biosciences and Biotechnology.
3. For Masters Program Abroad
If US and Canadian Universities - You need to give GRE and TOEFL and secure not just qualifying score, but a good score is must to get your program funded by the Universities
If UK and Australian Universities- you need to give IELTS examination, again should get a score good enough to attract funding (Some universities demand TOEFL mandatory and some won't, along with IELTS)
Some universities like National University of Singapore, Nayang Technical Universities which are the Best Universities offering Masters and Doctoral programs in Biotechnology, consider any of the GRE. GATE, IELTS scores for admission. (TOEFL is must in all cases).
4. Recently DEAKIN University of Australia (which is a premier university tied up with many Universities, Research labs and Industries in India for Doctoral programs) introduced Doctoral program in Applied areas like Biotechnology, Nanotechnology and Biomaterials and For Outstanding B.Tech students (with 80% through out their academic record) they are providing 100% Financial support for both course and personal expenses. There is also Masters in Science by Research (MS) program offered by the same university (those who aren't interested in pursuing PhD).
5. Deciding between India and Abroad for Masters: You can prefer Abroad (US/Australia) to India If you have
** No Financial glitches (you will get funding too if u have good GRE/IELTS score)
** Course content is best in Abroad than India
** Practical and Industry exposure is more in Abroad then India
** career prospects for Biotechnology are more abroad than in India
** Stress for interdisciplinary research in Biology related disciplines is more in Abroad than in India.
6. Notwithstanding the University, you will get funding for your program only if you have an outstanding competitive score (GATE/GRE/IELTS)
7. Coming into the preparation, GATE in Biotechnology or Lifesciences is little easier exam and requires not more than 2 months strict preparation for those who have good foundation in basic subjects of Biotechnology like Molecular Biology, cell Biology, Genetics and Biochemistry. A coaching is not at all required. practicing previous question papers will surely help you alot as many questions are repeated from previous papers. Also there are a few topics from which one question is compulsorily asked every year. They are
** Transcription and Translation in Molecular Biology
** Inhibition of protein synthesis (by antibiotics)
** Databases in Bioinformatics
** Sequence and similarity searches in Bioinformatics
** Growth kinetics and associated models
** Stoichiometry of cell growth and product formation
** Different types and variants of RNA and DNA
** One question on Application of probability and statistics
** Antigen and Antibody interactions and Hypersensitivity
** Application of various Enzymes in Biotechnology industry
Books like Instant notes in Biochemistry, Molecular Biology and Bioinformatics will help alot for the preparation and to cover the syllabus in less-time. Don't forget to solve previous years papers.
8. For GRE/IELTS and TOEFL Books like Barrons GRE, word power by Norman Lewis will surely be sufficient to crack most of the sections in GRE like Listening, Comprehension and Vocabulary.
Above All, Good planning of course of action is must especially for Biotechnology which is still in its infancy and is a booming discipline.
Select one exam (Based on Country preference), Give your best effort with efficient preparation.University selection can be done After the exam and based on the scores (because universities will have cut-off scores for various programs).Apply to a minimum of 5 Universities based on your scores. Consider course expenses, various funding options and scholarships available in the university before applying.
A planned course of action will surely provide a prosperous career in Biotechnology.
All the Best