GAT-B 2023 Question Paper with Keys & Explanations PDF Download | helpBIOTECH Academy
helpBIOTECH Academy brings you the complete GAT-B 2023 resources! The Graduate Aptitude Test - Biotechnology (GAT-B) 2023, organized by the National Testing Agency (NTA) on behalf of the Department of Biotechnology (DBT), took place on May 13, 2023. This national-level CBT exam selects candidates for DBT-supported postgraduate programs in Biotechnology and allied areas across India. Thousands of aspirants appeared, with results announced in June 2023.
The paper had two sections: Section A (60 compulsory MCQs, 1 mark each, 10+2 level in Physics, Chemistry, Maths, Biology & Aptitude; -0.5 negative) and Section B (100 MCQs at graduate level in Biotechnology, attempt any 60, 3 marks each; -1 negative). Total: 240 marks (60 from A + 180 from B).
Here's the detailed analysis of topic-wise questions and marks from the actual GAT-B 2023 Biotechnology paper (conducted on May 13, 2023). This breakdown covers Section A (10+2 level basics, 1 mark each) and Section B (graduate-level biotech concepts, 3 marks each). High-weightage units include Biochemistry, Molecular Biology, Genetics, Immunology, and Recombinant DNA Technology — focus on these for upcoming exams like GAT-B 2026!
GAT-B 2023 - Unit-Wise Question & Marks Distribution (Memory-Based Analysis)
GAT-B 2023 was rated moderate overall. Section A was easy-moderate (direct conceptual questions), Section B moderate-difficult (application-based in biotech). High scorers focused on proteins, enzymes, DNA/RNA processes, and rDNA.
| S.No | Unit / Topic | Section A Questions (1 mark each) | Section B Questions (3 marks each, attempted 60/100) | Total Marks (Approx.) |
|---|---|---|---|---|
| 1 | Physics (Mechanics, SHM, etc.) | 12-15 | 0 | 12-15 |
| 2 | Chemistry (Organics, Inorganics) | 12-15 | 0 | 12-15 |
| 3 | Mathematics / Aptitude | 10-12 | 0 | 10-12 |
| 4 | Biology Basics (10+2) | 10-15 | 0 | 10-15 |
| 5 | Biochemistry (Proteins, Enzymes, Metabolism) | 0 | 10-14 | 30-42 |
| 6 | Molecular Biology (DNA Replication, Transcription) | 0 | 12-15 | 36-45 |
| 7 | Genetics & Evolution | 0 | 8-12 | 24-36 |
| 8 | Immunology | 0 | 6-10 | 18-30 |
| 9 | Recombinant DNA Technology & Techniques | 0 | 10-14 | 30-42 |
| 10 | Cell Biology & Microbiology | 0 | 8-12 | 24-36 |
| 11 | Plant & Animal Biotechnology | 0 | 5-8 | 15-24 |
| 12 | Bioinformatics & Bioprocess | 0 | 4-6 | 12-18 |
Key Insights from GAT-B 2023 Paper:
- Overall Difficulty: Moderate (Section A easy-conceptual; Section B analytical with biotech depth).
- High-Weightage: Molecular Biology & Biochemistry (~40+ marks), rDNA & Genetics — many application questions on enzymes, sequencing, vectors.
- Cutoff Trends (2023): General ~127.5 marks, OBC ~ lower (check official for exact), SC/ST ~65-80. Top ranks scored 180+.
- Tip: Revise NCERT for Section A; Lehninger, Watson for B. Practice mocks — aim 140+ for good DBT seats.