Complete Guide to GAT-B 2026 Answer Key
Following the successful conclusion of the Graduate Aptitude Test-Biotechnology (GAT-B), the most anticipated event for candidates is the release of the answer key. Conducted by the National Testing Agency (NTA), the exam's evaluation process is transparent and highly structured. The NTA releases the answer key in two distinct phases: the Provisional Answer Key and the Final Answer Key.
The provisional answer key allows candidates to cross-check the official answers against the options they selected during the Computer Based Test (CBT). Along with the key, the NTA also uploads the candidates' recorded response sheets and the master question paper. This mechanism not only ensures absolute transparency in the evaluation process but also provides candidates with a fair opportunity to raise objections if they spot any genuine errors before the final merit lists are compiled.
How to Download the GAT-B Answer Key and Response Sheet
The NTA makes the answer key accessible exclusively through its official web portal. Candidates will not receive the answer key or response sheet via post or email. Follow these step-by-step instructions to securely download your documents:
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Visit the Official Portal: Navigate to the official NTA GAT-B website.
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Locate the Login Link: On the homepage, look under the 'Candidate Activity' or 'Latest News' section for the link titled "Display of Provisional Answer Keys and Question Papers with recorded Responses".
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Enter Credentials: Choose your preferred login method. You can log in using your GAT-B Application Number and Password, or your Application Number and Date of Birth.
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Enter Security Pin: Type in the case-sensitive captcha (security pin) displayed on the screen and click 'Sign In'.
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Download Documents: Once logged in to your candidate dashboard, you will find separate buttons to view your 'Recorded Response Sheet' and the 'Provisional Answer Key'.
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Save for Reference: Download both PDF files to your local device. It is highly recommended to take printouts to easily calculate your estimated score.
Provisional vs. Final Answer Key
It is vital to understand the distinction between the two versions of the answer key published by the NTA.
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Provisional Answer Key: Released a few days after the exam, this is the initial draft of the answers. It is open to public scrutiny. Candidates who believe a provided answer is incorrect can officially challenge it by providing valid proof and paying a processing fee.
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Final Answer Key: After the challenge window closes, a panel of subject experts appointed by the NTA reviews all submitted objections. If a challenge is found to be valid, the provisional key is revised. The NTA then publishes the Final Answer Key. No further challenges or grievances are entertained once the final key is released. The final results and scorecards are generated exclusively based on this finalized key.
How to Calculate Your GAT-B Score
To estimate your probable score accurately, you must keep both your recorded response sheet and the provisional answer key side-by-side. You must also rigorously apply the official GAT-B marking scheme, factoring in the negative marking penalties for both sections.
| Section | Total Questions | Questions to Attempt | Correct Answer | Incorrect Answer (Negative Marking) | Unattempted |
| Section A (10+2 Level) | 60 | 60 | +1 Mark | -0.5 Mark | 0 |
| Section B (Bachelor's Level) | 100 | 60 | +3 Marks | -1.0 Mark | 0 |
Formula for Score Calculation:
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Section A Score: (Number of Correct Answers × 1) - (Number of Incorrect Answers × 0.5)
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Section B Score: (Number of Correct Answers × 3) - (Number of Incorrect Answers × 1)
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Estimated Total Score: Section A Score + Section B Score (Out of a maximum of 240 marks).
Procedure to Challenge the Provisional Answer Key
If you strongly believe that the NTA's provisional answer key contains an error—whether an incorrect answer is marked correct, or a question itself is flawed—you have the right to challenge it. The NTA provides a strict 2-3 day window for this process.
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Log In: Access your dashboard on the official NTA GAT-B portal using your application number and password.
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Access the Challenge Interface: Click on the link designated for "Answer Key Challenge".
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Select Questions: You will see a sequential list of Question IDs and the corresponding 'Correct Option ID' as per the NTA. Check the box next to the Question ID you wish to challenge.
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Propose the Correct Option: Under the column 'Options Claimed', select the Option ID that you believe is the correct answer.
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Upload Justification (Optional but Recommended): You can upload a single PDF document containing your mathematical proof, textbook references, or scientific justification supporting your claim.
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Pay the Processing Fee: Click on 'Save your Claims and Pay Fee'. The NTA generally charges a non-refundable processing fee (e.g., ₹200) for every single question challenged. This fee must be paid online via debit/credit card, net banking, or UPI.
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Confirmation: Download and print the 'Answer Key Challenge Receipt' for your records.
Note: The fee is strictly non-refundable, even if the subject experts accept your challenge and revise the answer key.