CSIR NET Exam Pattern 2026: Subject-Wise Marks, Negative Marking and Attempt Limits

The CSIR NET exam pattern follows one three-part structure for every paper: a common general aptitude part, a subject part and a higher-order analytical part. The National Testing Agency (NTA) conducts the Joint CSIR-UGC NET for the Council of Scientific and Industrial Research (CSIR) in five science subjects, as a three-hour computer-based test. Your score decides whether you qualify for a Junior Research Fellowship (JRF), Assistant Professor eligibility or Ph.D. admission.

Table of contents

• CSIR NET Exam Pattern 2026 at a Glance

• What Is New in the December 2026 Cycle

• Structure of the Question Paper

• Subject-Wise CSIR NET Exam Pattern

• Marking Scheme and Negative Marking

• How the Attempt Limit Works

• Mathematical Sciences Part C

• From Marks to Result

• Exam Day Rules That Affect Your Attempt

• How to Prepare for This Pattern

• Key Takeaways

This guide covers the December 2026 cycle and is based on the official Information Bulletin. It gives subject-wise question and marks tables, negative marking for every part, attempt limits, and what they mean for the way you spend your three hours. The Life Sciences paper has a new name this cycle, and the exam dates differ from the early NTA calendar, so older pages may be out of date.

CSIR NET Exam Pattern 2026

Dates in the bulletin are tentative and NTA will inform applicants if they change. Track the official website and your registered email.

What Is New in the December 2026 Cycle

• Life Sciences is now Life Sciences and Bio-Technology (LS-BT): Paper 703 merges the CSIR-NET Life Sciences and DBT-BET Biotechnology exams. A CSIR-HRDG notice dated 13 January 2026 says the merged paper carries enough optional questions from both areas. The numbers are unchanged: 145 questions, of which you attempt up to 75.

• Three exam days: The bulletin lists 19, 22 and 27 December 2026 in two shifts. An earlier NTA calendar showed 20 and 21 December, but the bulletin is the document to follow.

• Same marks and negative marking: The scheme for all five papers matches the one in the June 2025 bulletin.

Older pages may still show the 20 and 21 December dates or the old Life Sciences paper name, so follow the official bulletin.

Structure of the Question Paper

Every paper has Parts A, B and C, all objective type. There is no break between parts, and you can move between parts and questions freely while the clock runs.

Part A: General Aptitude

Part A is common to all subjects. It tests logical reasoning, graphical analysis, analytical and numerical ability, quantitative comparison, series formation and puzzles. Every paper has 20 questions here, you attempt up to 15, and each correct answer earns 2 marks.

Part B: Subject Questions

Part B has conventional subject MCQs that generally cover the topics in the syllabus published by CSIR HRDG. These questions check how well you know the core concepts. Our CSIR NET syllabus guide breaks the topics down.

Part C: Higher-Order Questions

Part C tests scientific concepts and how you apply them. The questions are analytical, and you are expected to use your knowledge to solve a scientific problem. This part carries the highest marks per question in every subject.

Subject-Wise CSIR NET Exam Pattern

You choose one subject while applying. The table below follows the official scheme in the Information Bulletin.

Chemical Sciences (701)

Specialisations listed in the bulletin are analytical, inorganic, organic and physical chemistry, plus others. Part C offers 60 questions for 25 attempts, so you have room to pick the ones you are most comfortable with.

Earth, Atmospheric, Ocean and Planetary Sciences (702)

This is the largest question pool, with 150 questions. Specialisations include geology, geophysics, meteorology, oceanography and physical geography. Part C has the steepest penalty of any paper at 33 percent.

Life Sciences and Bio-Technology (703)

The specialisations listed are biochemistry, biodiversity and taxonomy, biotechnology, botany, genetics, microbiology, physiology and zoology. Because Part B and Part C offer more questions than you can attempt, the choice of questions matters as much as speed.

Mathematical Sciences (704)

Specialisations are applied mathematics, pure mathematics and statistics. You attempt fewer questions here than in other papers, but each one carries more marks, and Part C has no negative marking.

Physical Sciences (705)

This is the smallest paper, with 75 questions and 55 attempts. Each Part C answer is worth 5 marks, which makes accuracy in that part critical. Specialisations include classical dynamics, condensed matter physics, electromagnetics, electronics, nuclear and particle physics, quantum physics and thermodynamics.

Marking Scheme and Negative Marking

A correct answer earns the marks shown in the table above. A wrong answer costs a fixed share of those marks, and unattempted questions carry zero.

Here is how a Chemical Sciences score works out. Suppose you attempt 15, 35 and 25 questions and answer 12, 28 and 15 of them correctly.

• Part A: 12 correct (+24) and 3 wrong (-1.5) give 22.5 marks.

• Part B: 28 correct (+56) and 7 wrong (-3.5) give 52.5 marks.

• Part C: 15 correct (+60) and 10 wrong (-10) give 50 marks.

Your total is 125 out of 200. Only questions that are answered, or answered and marked for review, are evaluated. A question marked for review without an answer is not counted.

What this means for you

• Part C decides the result: In Chemical, Earth and Life Sciences, 25 Part C answers carry 100 of the 200 marks. In Physical Sciences, 20 answers carry 100 marks, and in Mathematical Sciences 20 answers carry 95.

• Guessing has a break-even point: With a 25 percent penalty, an answer pays off in the long run once you are right one time in five. In Earth Sciences Part C, where the penalty is 33 percent, you need about one in four. Attempt questions where you know the concept or can remove at least one option.

• Mathematical Sciences Part C is penalty-free: You can answer your full quota there without risk, though the quota still caps at 20 questions.

• No calculator is allowed: Practise numerical work by hand, since rough sheets are the only help at the centre.

How the Attempt Limit Works

The attempt limit applies to each part separately. If you answer more than the allowed number in a part, only the first 15, 35 and 25 questions (or the limit for your subject) in Parts A, B and C are taken up for evaluation. Extra answers earn nothing, so stop at the limit and use the spare time to recheck.

The limit also shapes your time. Dividing 180 minutes by the maximum attempts gives a rough time per question, before any revision time.

For a 75-attempt paper, a workable starting split is about 30 minutes for Part A, 60 for Part B and 75 for Part C, with 15 minutes left for review. Treat this as a first draft and adjust it through mock tests.

Mathematical Sciences Part C

In Part C of Mathematical Sciences, each question may have one or more correct options. You get credit only if you identify all the correct options, and there is no partial credit. Each correct answer earns 4.75 marks, you attempt up to 20 of 60 questions, and a wrong answer carries no penalty.

From Marks to Result

Your result depends on the cumulative marks of all three parts, because there is no separate cut-off for Part A, B or C. The score card shows total marks and percentile score. The minimum benchmark is 33 percent for General, EWS and OBC candidates, and 25 percent for SC, ST and PwD or PwBD candidates.

Exam Day Rules That Affect Your Attempt

• One subject only: You pick the subject in the application form, and attempting a different paper on exam day leads to cancellation. Filing more than one application also counts as unfair means.

• Reporting time: The bulletin advises reaching the centre two hours before the exam, and the FAQ says entry closes half an hour before it begins.

• No early exit: You cannot leave before the 180 minutes end, except in a genuine medical emergency. The on-screen timer ends the test automatically.

• Rough work: Use only the sheets given at the centre, write your name and application number on each, and hand them in at the end.

• No retest: NTA does not hold a re-exam for anyone who misses the scheduled date.

How to Prepare for This Pattern

1. Map the syllabus to Part B first: List every unit, mark the ones you can already solve, and start with the weakest high-weight unit.

2. Make Part A a daily habit: Spend 30 minutes a day on reasoning, graphs and numerical ability. Fifteen answers at 2 marks each give you 30 marks in every paper.

3. Practise Part C by solving, not reading: Work through numerical and application questions on paper, since this part carries half the marks in most papers.

4. Move to sectional tests, then full mocks: Take 180-minute mocks in the real format, and record accuracy per part rather than only the total.

5. Revise from an error log: In the last weeks, analyse each mock the same day and revisit the questions you got wrong or skipped.

Key Takeaways

The CSIR NET exam pattern gives you 180 minutes for a 200-mark, three-part paper, and your attempt limit and negative marking differ by subject. Part C carries the most marks, so protect your accuracy there. Choose your questions deliberately, stay within each part's limit, and rehearse the full format with timed tests.