# GATE BT 2025 Previous Year Question Paper

> GATE BT 2025 paper and answer key from IIT Roorkee: 33 MCQ, 15 MSQ, 17 NAT questions, hosted as PDF.

Source: https://previousyearquestions.app/gate/bt/2025/

The official GATE BT 2025 question paper and answer key are on this page as PDFs from IIT Roorkee, with the original source linked beside each file. The GATE BT exam covers General Aptitude, Engineering Mathematics and BT core. Download them below, then sit the paper under exam timing with the attempt plan and error-log routine on this page.

Explore: <a href="/gate/bt/">GATE BT hub</a> · <a href="/gate/bt/syllabus-pattern/">Syllabus & pattern</a> · <a href="/gate/bt/2026/">GATE BT 2026</a> · <a href="/gate/2025/">GATE 2025 (all papers)</a> · <a href="/guides/how-to-use-previous-year-papers/">How to use PYQs</a>

<Callout type="tip" title="Download the paper" icon="lucide:file-down">
**[Download the official GATE BT 2025 paper and answer key (PDF)](#download-question-paper)**, hosted on this site with the official source linked.
</Callout>

## GATE BT 2025 at a glance

GATE BT 2025 was set by **IIT Roorkee**. The files are hosted below: the question paper and answer key.

| | |
| --- | --- |
| Organising institute | IIT Roorkee |
| Paper | Biotechnology (BT) |
| GATE 2025 exam window | 1, 2, 15 and 16 February 2025 |
| Paper hosted here | 1 (plus answer key) |
| Question types | 33 MCQ, 15 MSQ, 17 NAT |
| Questions | 65: 10 General Aptitude (15 marks) + 55 core (85 marks) |
| Total marks | 100 |
| Duration | 3 hours |

All counts come from the official answer key for GATE BT 2025.

## Paper analysis

### Snapshot of GATE BT 2025

GATE BT 2025 gave one full paper. The official key lists 33 MCQ, 15 MSQ, 17 NAT, so 26% of the paper is typed-answer (NAT) questions, which carry no negative marking.

Of the 55 Biotechnology questions, 25 are worth 1 mark and 30 worth 2 marks; 9 of the 2-mark questions are NAT.

Against GATE BT 2024, MCQs moved by -7 and NATs by +2, MSQs by +5.

15 questions are multi-select (MSQ): they score only when the full correct set is chosen and nothing wrong, with no negative marking.

GATE 2025 was organised by IIT Roorkee; the original files were published on the organising institute's GATE site.

### What this paper stresses

- BT is the one paper where a large share of the core is biology, so memorised facts and short reasoning questions sit next to bioprocess numericals.
- Bioprocess and enzyme-kinetics numericals are the usual NAT source; practise them with unit discipline.
- General Aptitude is 10 questions and 15 marks, easy to rush.

### What to extract before you move on

- NAT vs MCQ miss counts. MSQ misses separately, since one wrong option loses the whole question.
- GA topics you guessed versus knew.
- A personal subject-weight table for Biotechnology from this sitting: Engineering Mathematics, Biochemistry and Cell Biology, Microbiology and Immunology and the rest.
- Every question where your answer was right but your time on it was not.

**Analyst note:** Mark by the numbering in the paper you downloaded.

<PaperDownloads exam="gate-bt" year={2025} heading="Download the GATE BT 2025 paper and answer key" />

## How to sit GATE BT 2025

1. Download the paper and its answer key from this page. Do not open the key yet.
2. Sit the full paper in three hours, one sitting: 10 GA questions and 55 Biotechnology questions. Re-key NAT answers before you stop.
3. Mark it with the official key: MCQ by option, NAT by the range in the key. Give an MSQ mark only when the whole option set matches. Apply negative marks on MCQs only.
4. Fill the error log the same day: section, subject, and miss type (concept, silly, time or misread).
5. Next session, repair only the logged items, then pick another year from the list below.

## Other years on this hub

- [GATE BT 2026](/gate/bt/2026/)
- [GATE BT 2024](/gate/bt/2024/)
- [GATE BT 2023](/gate/bt/2023/)
- [GATE BT 2022](/gate/bt/2022/)
- [GATE BT 2019](/gate/bt/2019/)
- [GATE BT 2018](/gate/bt/2018/)
- [GATE BT 2017](/gate/bt/2017/)
- [GATE BT 2016](/gate/bt/2016/)

## FAQ

### Where can I download the official GATE BT 2025 question paper?
On this page: the official IIT Roorkee question paper and answer key, with a link to each original source.

### How many questions were in GATE BT 2025?
65 questions for 100 marks in 3 hours: 10 General Aptitude questions for 15 marks and 55 Biotechnology questions for 85 marks. The key lists 33 MCQ, 15 MSQ, 17 NAT.

### When was GATE BT 2025 held?
GATE BT 2025 was part of the GATE 2025 exam window, organised by IIT Roorkee, which ran on 1, 2, 15 and 16 February 2025.

### How were MSQs marked in GATE BT 2025?
15 questions were multi-select (MSQ). A multi-select answer scores only when every correct option, and no wrong one, is chosen; there is no negative marking for MSQ or NAT.

### Are memory-based GATE BT 2025 papers reliable?
There is no need for them where the official paper is public. Use the files from IIT Roorkee's GATE site, not coaching reconstructions.

### Where is the GATE BT syllabus and pattern?
See the GATE BT syllabus and pattern page on this hub, and check the current official brochure before your exam.

## Related reading

- [How to use previous year papers](/guides/how-to-use-previous-year-papers/)
- [How many years of PYQs?](/guides/how-many-years-of-pyqs/)
- [Memory-based vs official papers](/guides/memory-based-vs-official-papers/)
- [GATE BT syllabus & pattern](/gate/bt/syllabus-pattern/)