How to Prepare for the PhD Interview at IIT Guwahati — A Complete Guide
Indian Institute of Technology Guwahati — one of India's premier research institutions. (Photo: Wikimedia Commons)
Getting into a PhD program at IIT Guwahati is a goal that thousands of students work toward every year. I recently went through the entire interview process at the Department of Biosciences and Bioengineering (BSBE) for the July 2026 session, and I want to share everything I learned — from when to apply, to what happens in each round of the interview.
This guide covers the full process step by step, so you know exactly what to expect and how to prepare.
"It is only after you qualify the second round that you will be able to secure admission into IIT Guwahati. Every layer of this process is designed to find the right researcher for the right lab."
When Does IIT Guwahati Accept PhD Applications?
IIT Guwahati recruits PhD scholars twice a year. Here are the two windows:
- Summer Opening (July Session): Applications open from mid-March to mid-April. Interviews are usually held in May.
- Winter Opening (January Session): Applications open from mid-September to the first week of October. Interviews follow shortly after.
My interview was on 22nd May 2026, as part of the July 2026 session interviews held from 19th–22nd May 2026.
Who Can Apply? Eligibility and Category System
The Academic Complex at IIT Guwahati. (Photo: Wikimedia Commons)
To apply for a PhD at IIT Guwahati, you must have qualified either CSIR NET JRF or GATE. Both routes lead to the same program but with a key difference — you only compete against candidates who qualified through the same exam as you.
So if you are a CSIR NET JRF holder, your competition pool is only other CSIR NET JRF candidates. GATE candidates are evaluated separately. This is a significant structural advantage — your actual competition is much smaller than it may seem at first.
The Interview Structure: Two Rounds
The PhD interview at IIT Guwahati happens in two rounds. You must clear Round 1 to proceed to Round 2. Only those who clear Round 2 are offered admission.
Step 1: Orientation and the Committee Preference Sheet
On the day of the interview, you attend an orientation session. Here, you are given a Committee Preference Sheet listing all the interview committees (A through F for the BSBE department). Each committee corresponds to a broad research area, and each has several faculty members listed under it along with their individual research topics.
You need to fill in your preference ranking (1, 2, 3) for a minimum of 1 and a maximum of 3 committees. Choose based on where your academic background and research interests are strongest.
Step 2: Round 1 — The Fundamentals Interview
Round 1 is conducted by a committee corresponding to your preferred area. The questions focus on:
- Core concepts from your graduation and postgraduate courses
- Your dissertation or master's thesis — topic, methodology, findings, and limitations
- Lab techniques you have hands-on experience with
- Basic scientific reasoning
This is a screening round. It is relatively broad and tests how solid your foundational knowledge is. If you clear Round 1, you proceed to the next stage.
Step 3: The Faculty Preference Sheet
After clearing Round 1, you are given the Faculty Preference Sheet. This is the sheet I filled out during my own interview, shown below.
My actual Faculty Preference Sheet from the IIT Guwahati PhD interview, 22nd May 2026. I selected Prof. Kannan Pakshirajan as my Priority 1 faculty choice under Committee A: Biochemical Engineering.
The sheet lists the same faculty members from your qualifying committee, but now you rank individual faculty members — not committees — in order of your preference. You can select between 1 and 3 faculty members.
This step matters a lot. Choose faculty whose research area genuinely matches your background and interests. If you've read their papers before walking in, that shows in Round 2.
Step 4: Round 2 — The Research Interview
Round 2 is significantly more demanding than Round 1. You'll be interviewed by faculty from the committee you qualified through. The questions go much deeper:
- In-depth questions about your research area
- Your understanding of recent developments in your field
- How you would approach a research problem
- Your presence of mind and ability to reason under pressure
Bluffing here is a bad idea — the faculty interviewers are experienced researchers who can tell the difference between genuine understanding and surface-level knowledge. Intellectual honesty and curiosity matter as much as technical answers.
The Six Interview Committees at BSBE
Below is the complete list of interview committees and faculty for the BSBE department, July 2026 session. This is drawn directly from the official Committee Preference Sheet distributed during orientation.
| No. | Faculty | Research Area |
|---|---|---|
| Committee A: Biochemical Engineering | ||
| i | Prof. Debasish Das | Biochemical and Bioprocess Engineering |
| ii | Prof. Kannan Pakshirajan ★ | Environmental Biotechnology; Nanomaterials in Biomedical and Environmental Applications; Microbial Approaches for Enhanced Oil Recovery |
| iii | Dr. Lalit Pandey | Surface Engineering of Biomaterials; Biochemical and Bioenvironmental Engineering |
| iv | Dr. Selvaraju Narayanasamy | Biochemical and Bioenvironmental Engineering |
| v | Prof. Senthilkumar Sivaprakasam | Advanced Biomanufacturing of Biologics and Biosimilars |
| vi | Dr. Soumen Kumar Maiti | Biochemical Engineering; Metabolic Engineering; Biofuels |
| vii | Prof. V Venkata Dasu | Bioprocess Engineering and Metabolic Engineering |
| Committee B: Cancer and Regenerative Biology | ||
| i | Prof. Ajaikumar Kunnumakkara | Cancer Biology and Therapeutics |
| ii | Dr. Anil Mukund Limaye | Molecular Endocrinology |
| iii | Prof. Biman B Mandal | Regenerative Medicine; Tissue Engineering; Organ-on-a-Chip and Cancer Therapeutics |
| iv | Prof. Bithiah Grace Jaganathan | Cancer Biology and Signaling; Cancer Immunotherapy |
| v | Dr. Rajkumar P Thummer | Stem Cell Biology |
| vi | Prof. Siddhartha S Ghosh | Cancer Signaling; Cancer Therapeutics; Nanotheranostics |
| Committee C: Cell and Molecular Biology | ||
| i | Prof. B Anand | Host-Microbe Interaction; Microbial Ecology; Structural and Computational Biology |
| ii | Dr. Kapish Gupta | Cell and Molecular Biology; Disease Biology; Mechanobiology |
| iii | Dr. Kusum K. Singh | Molecular Biology; RNA-Binding Proteins; Post-Transcriptional Gene Regulation; Genome Editing |
| iv | Prof. Latha Rangan | Applied Biodiversity |
| v | Prof. Ranjan Tamuli | Cell Signaling in Fungi |
| vi | Dr. Shirisha Nagotu | Cell Biology; Organelle Dynamics; Cellular Aging |
| Committee D: Computational Biology | ||
| i | Dr. Biplab Bose | Mathematical Biology; Computational Systems Biology |
| ii | Dr. Navin Gupta | Neural Engineering |
| iii | Dr. Priyadarshi Satpati | Computational Biology |
| iv | Dr. Souptick Chanda | Biomechanics and Implant Design |
| v | Prof. Utpal Bora | Genome Informatics |
| Committee E: Microbiology and Plant Biotechnology | ||
| i | Prof. Lingaraj Sahoo | Genome Editing; RNAi and Epigenetics for Crop Improvement |
| ii | Prof. Manish Kumar | Protein Biochemistry; Molecular Microbiology & Host-Pathogen Interaction |
| iii | Prof. Rakhi Chaturvedi | Plant Tissue Culture and Secondary Metabolite Production |
| iv | Prof. Sachin Kumar | Virology |
| v | Prof. Shankar P Kanaujia | Molecular and Structural Biology; Protein Biochemistry; Drug Resistance |
| vi | Prof. Vishal Trivedi | Malaria Drug Discovery and Diagnostics |
| Committee F: Structural Biology | ||
| i | Prof. Arun Goyal | Protein Structure and Function |
| ii | Dr. Himanshu Singh | Chemical Biology; Molecular Biophysics; Structural Biology; Protein NMR Spectroscopy |
| iii | Prof. Nitin Chaudhary | Biophysics |
| iv | Prof. R. Swaminathan | Protein Post-Translational Modifications |
| v | Prof. Vibin Ramakrishnan | Network Medicine; Drug Delivery |
★ My personal Priority 1 faculty choice.
How to Prepare: Practical Tips
View of the Brahmaputra river from the IIT Guwahati campus. (Photo: Wikimedia Commons)
1. Know your dissertation inside and out
Your thesis is the most interrogated document in Round 1. Be ready to explain every technique, every result, and every limitation — and know the scientific principles behind each method you used, not just the protocol steps.
2. Revise your core subjects
Round 1 is firmly about fundamentals. Go back to your graduation and postgraduate textbooks. Topics like Biochemistry, Cell Biology, Microbiology, Molecular Biology, and Bioprocess Engineering are commonly tested. Don't skip subjects just because you haven't revisited them in a while.
3. Research the faculty before you arrive
Before you fill out the Faculty Preference Sheet, read recent papers from the faculty you are considering. Know their key contributions and at least one active area of work. In Round 2, this preparation visibly demonstrates genuine interest — and the faculty notice it.
4. Choose committees strategically
You can select up to 3 committees, but that doesn't mean you should pick randomly. Choose committees where your academic background gives you a real advantage in Round 1, not only based on what sounds exciting. A strong match with the committee's research area improves your Round 1 outcome meaningfully.
5. Be honest — especially in Round 2
If you don't know something, say so and reason through what you do know. The faculty in Round 2 are seasoned researchers — they can tell the difference between genuine thinking and bluffing. Intellectual honesty paired with curiosity is exactly what they want to see in a future PhD student.
6. Know your lab techniques deeply
Both rounds can include questions about practical techniques. Know the underlying principles behind gel electrophoresis, PCR variants, chromatography, cell culture, fermentation, spectrophotometry, and any technique specific to your area. Being able to troubleshoot common problems with these techniques is a definite plus.
Final Thoughts
The IIT Guwahati PhD selection process is thorough by design. The committee structure, the two-round format, and the faculty preference system exist to match the right researcher with the right lab — and that's actually a good thing. If your preparation is solid and you are honest about what you know and what you're curious about, the process works in your favour.
"IIT Guwahati's PhD selection is thorough by design — it exists to place the right researcher in the right lab. Treat every round as an opportunity to showcase not just what you know, but how you think."
I hope this guide helps demystify the process for everyone who is preparing for their IIT Guwahati PhD interview. Best of luck to all applicants for the upcoming sessions.
— Mohammed Saeed Ahmed Khan
Applicant No. 2026PHDJULBT0160 · General Category
Department of Biosciences and Bioengineering, IIT Guwahati · July 2026 Session
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