Imagine you are on question 61 of your CSIR NET Life Science paper. Four options are on screen, and you can eliminate only one of them. Do you click or do you skip?
That decision, repeated across 75 Part C questions, quietly separates JRF candidates from the rest. It is why the question “Is there negative marking in CSIR NET Life Science Part C?” gets searched so often, especially after every result cycle.
The internet is full of conflicting answers. Some pages say Part C has no penalty. Others say it carries a full one mark deduction. Both cannot be right. Before writing this guide, I compared the exam pattern pages, news reports and the official cutoff data released for the December 2025 and June 2026 cycles. This article gives you the answer, the maths behind it and a practical way to use it.
Is There Negative Marking in CSIR NET Life Science Part C? The Short Answer
Yes. In the current pattern, candidates get 2 marks for each correct answer in Parts A and B and 4 marks in Part C. Each wrong answer costs 0.5 marks in Parts A and B and 1 mark in Part C. Education portals describe this as 25 percent negative marking across Parts A, B and C for Life Sciences.
The December 2025 exam pattern summary carried the same statement, that negative marking applies to Part A, B and C at 25 percent.
The rule is simple:
- A correct answer in Part C gives you +4.
- A wrong answer in Part C gives you −1.
- An unattempted question gives you 0.
Always confirm the final rule in the latest NTA and CSIR information bulletin before your exam, because that document overrides every blog, including this one.
CSIR NET Life Science Exam Pattern at a Glance
To see how Part C negative marking hurts or helps, you need the full paper structure. The paper is a computer based test of 3 hours and 200 marks. Life Sciences candidates attempt 75 MCQs in total from Parts A, B and C.
| Part | What it tests | Questions given | Questions to attempt | Marks per correct answer | Marks lost per wrong answer | Maximum marks |
|---|---|---|---|---|---|---|
| A | General aptitude, reasoning, data interpretation | 20 | 15 | 2 | 0.5 | 30 |
| B | Core subject knowledge | 50 | 35 | 2 | 0.5 | 70 |
| C | Application, analysis, research based questions | 75 | 25 | 4 | 1 | 100 |
| Total | 145 | 75 | 200 |
Part C has half of the total marks, and you only need to attempt 25 of its 75 questions. That gives you a big advantage: you can choose your battles. Ignore the questions that scare you and attempt the ones you can reason through.
Part C Negative Marking Explained with Simple Maths
Because Part C rewards 4 marks and penalises 1 mark, the ratio is 4 to 1. That ratio hides a useful number: the breakeven probability.
Suppose you are only guessing on a question, and your chance of being right is p. Your expected score is:
Expected marks = 4 × p − 1 × (1 − p) = 5p − 1
That is zero when p = 0.20, or 20 percent. So:
- If you are more than 20 percent sure, attempting is mathematically worth it.
- If you are below 20 percent sure, skipping is the better decision.
- With four options and random guessing, your chance is 25 percent, which is slightly positive. Blind guessing is not disastrous. Informed guessing is much better.
Example 1. You answer 25 questions, 15 correct and 10 wrong. You score 15 × 4 = 60, minus 10 × 1 = 10. Part C total: 50.
Example 2. You answer 25 questions, 20 correct and 5 wrong. You score 80 − 5 = 75.
Example 3. You answer 25 questions, 10 correct and 15 wrong. You score 40 − 15 = 25.
Look at the gap. Fifteen extra correct answers between Example 3 and Example 1 change your score by 25 marks. When cutoffs move by only a few marks between categories, that is enormous.
The same 20 percent breakeven applies to Parts A and B, because 2 marks against 0.5 is also a 4 to 1 ratio. The whole paper works on one simple logic.
Why Do Some Websites Say There Is No Negative Marking in Part C?
If you searched this topic before, you probably saw contradictions. There are three reasons.
1. Old pattern documents are still online. Older CSIR scheme documents for the single paper format described Part A and B negatives at 25 percent and no negative in Part C for some subjects. Those files still circulate on document sharing sites, and copy paste blogs reuse them. One such document still lists Engineering Sciences, which shows how old it is.
2. Subjects differ. Negative marking changes with the subject and section. A page for Earth Sciences reports 25 percent in Parts A and B and 33 percent in Part C, while Life Sciences shows 25 percent in all three parts. A student reading a general page can easily apply another subject’s rule to Life Sciences. Shiksha
3. Sloppy rewriting. Many pages copy each other without checking the latest bulletin. One exam pattern page still states there is no negative marking for Part C while listing negative marks for all three parts in the same paragraph. That is a clear internal contradiction.
The takeaway: rely on the latest official bulletin and the most recent result year, not on old PDFs or unnamed blogs.
Real CSIR NET Life Science Cutoff Data (June 2026, December 2025, June 2025)
Negative marking only makes sense when you know what score you are aiming for. Here is the data I collected from the official CSIR HRDG cutoff notices as reported by education portals.
June 2026 Life Science Cutoff
The exam was held on 17 and 18 July 2026, and the cutoff came out on 10 September 2026. Life Sciences had by far the largest pool, with 83,546 registered and 67,650 appearing.
JRF (Category 1)
| Category | Cutoff % |
|---|---|
| UR | 66.500 |
| EWS | 59.250 |
| OBC | 58.000 |
| SC | 49.500 |
| ST | 44.750 |
| PwD | 30.750 |
Assistant Professor (Category 2)
| Category | Cutoff % |
|---|---|
| UR | 59.850 |
| EWS | 53.325 |
| OBC | 52.200 |
| SC | 44.550 |
| ST | 40.275 |
| PwD | 27.675 |
PhD only (Category 3)
| Category | Cutoff % |
|---|---|
| UR | 50.250 |
| EWS | 40.500 |
| OBC | 42.000 |
| SC | 36.500 |
| ST | 33.000 |
| PwD | 25.000 |
A UR JRF cutoff of 66.5 percent works out to roughly 133 marks out of 200, and the Assistant Professor cutoff of 59.85 percent to roughly 120 marks. Treat those conversions as approximate. Some education portals mention that Life Sciences cutoffs can involve normalisation, so the raw marks you need may differ slightly from a simple percentage conversion.
December 2025 Life Science Cutoff
The exam was held on 18 December 2025 and the cutoff was released on 23 February 2026. The UR JRF cutoff was 54 percent and the Assistant Professor cutoff 48.6 percent. OBC and EWS JRF cutoffs were 44.25 and 44 percent.
| Category | JRF % | Assistant Professor % | PhD only % |
|---|---|---|---|
| UR | 54.000 | 48.600 | 39.000 |
| EWS | 44.000 | 39.600 | 33.000 |
| OBC | 44.250 | 39.825 | 33.000 |
| SC | 36.000 | 32.400 | 25.000 |
| ST | 34.250 | 30.825 | 25.000 |
| PwD | 25.000 | 25.000 | 25.000 |
June 2025 Life Science Cutoff
| Category | JRF % | Assistant Professor % | PhD only % |
|---|---|---|---|
| UR | 51.50 | 46.350 | 38.25 |
| EWS | 44.00 | 39.60 | 33.00 |
| OBC | 43.75 | 39.375 | 33.00 |
| SC | 37.25 | 33.525 | 27.50 |
| ST | 35.75 | 32.175 | 25.75 |
| PwD | 25.00 | 25.00 | 25.00 |
What the Trend Tells You
- The UR JRF cutoff moved from 51.50 percent (June 2025) to 54 percent (December 2025) and then to 66.5 percent (June 2026). That is a 15 point jump from June 2025 to June 2026, the biggest increase of any subject.
- Another education site notes that the June 2024 cycle was unusually high at 99.08 percent for UR JRF, which shows how much Life Sciences cutoffs can swing between sessions. Since that figure looks percentile based, it should not be compared directly with the later percentage values.
- The basic benchmark stays constant: 33 percent for General, EWS and OBC and 25 percent for SC, ST and PwD, applied to all three categories.
- There is no separate cutoff for Part A, Part B or Part C. CSIR considers cumulative marks.
That last point matters for strategy. You are not required to clear Part C separately. Your total score is what counts, so an extra wrong answer in Part C hurts your total, not a sectional target.
How Negative Marking Should Change Your Attempt Strategy
Now let us connect the marking scheme to the cutoffs above. If you are aiming for JRF in the UR category in 2026 conditions, you need around 133 marks. Here is one realistic way to get there.
| Part | Attempts | Correct | Wrong | Marks |
|---|---|---|---|---|
| A | 15 | 11 | 4 | 22 − 2 = 20 |
| B | 35 | 26 | 9 | 52 − 4.5 = 47.5 |
| C | 25 | 18 | 7 | 72 − 7 = 65 |
| Total | 132.5 |
This candidate answers 75 questions and gets 55 right, an accuracy of about 73 percent. Notice how wrong answers cost roughly 13.5 marks in total. If the same candidate had guessed more aggressively and gone from 7 wrong to 12 wrong in Part C, they would have lost another 5 marks. Five marks can be the entire gap between JRF and Assistant Professor eligibility in some categories.
A Practical Rule for Part C
Classify every Part C question into one of three buckets during the first pass:
- Green: you know the concept, and the answer follows from it. Attempt it immediately.
- Amber: you can eliminate two options. Your chance rises to roughly 50 percent, which is well above the 20 percent breakeven. Attempt it in the second pass.
- Red: you cannot eliminate anything. Skip it, unless you have already filled your attempt limit with safer questions.
Since you only need 25 answers out of 75 questions, you should never have to touch red questions.
The Time Factor
Three hours for 75 answers gives you about 2.4 minutes per question on average. Part A questions take less time, so you can spend more on Part C. Many toppers spend the first 25 to 30 minutes on Part A and B basics, then invest the largest block of time in Part C. Adapt this to your own speed after mock tests.
Smart Tips to Reduce Wrong Answers in Part C
Read the question stem twice. Part C questions are often built around experiments, graphs and data. Most wrong answers come from misreading a condition, not from missing knowledge.
Practise elimination. Wrong options often contradict a basic principle you already know. Removing even one option lifts your odds meaningfully.
Use previous year papers the right way. Do not just check answers. Mark which questions you attempted, which you were confident about and how many of your “confident” answers were actually wrong. That calibration is more valuable than the score.
Track your accuracy, not only your marks. If your Part C accuracy in mocks is below 65 percent, you are probably attempting too many uncertain questions. If it is above 85 percent but you finish early, you might be too cautious.
Do not chase the attempt limit. Some students feel they must fill all 25 quickly. It is fine to answer 25 questions slowly and carefully. It is also fine to leave questions when the paper is unusually tricky.
Common Mistakes Students Make Because of Negative Marking
- Assuming “no negative marking” from an old blog. This leads to random guessing and heavy losses.
- Panic skipping everything uncertain. Skipping all amber questions can leave you far below the cutoff.
- Ignoring Part A. A 20 to 25 mark swing from careful Part A attempts is equal to six Part C questions.
- Not practising the negative marking scheme in mocks. Take your mocks with the real marking rule so your intuition matches exam conditions.
- Comparing raw marks across sessions without context. Cutoffs changed dramatically between 2025 and 2026, so last year’s target may not be enough.
Preparing with Chandu Biology Classes
If you want guided preparation instead of piecing together resources alone, Chandu Biology Classes is the coaching reference I would point you to for CSIR NET Life Sciences. The institute also publishes its own guide on qualifying marks and category wise analysis for CSIR NET Life Sciences on its website, which is worth reading alongside the official cutoff notices.
Fee structure of Chandu Biology Classes:
| Mode | Fees |
|---|---|
| Online | ₹25,000 |
| Offline | ₹30,000 |
These are the total fees and no other charges are included. There are no additional add on costs to plan for, which makes budgeting easy.
Why structured coaching helps with Part C:
- Part C rewards conceptual clarity and data interpretation, which improve faster with regular doubt solving.
- Test practice with the real marking scheme helps you build the attempt discipline discussed above.
- A fixed timetable reduces the risk of leaving heavy topics for the last month.
Before joining any programme, check the current batch details directly with Chandu Biology Classes, because schedules and inclusions can change.
Frequently Asked Questions
1. How many marks are deducted for a wrong answer in CSIR NET Life Science Part C?
One mark is deducted for every wrong answer in Part C, while a correct answer gives 4 marks. Unattempted questions do not carry any deduction.
2. Is there negative marking in CSIR NET Life Science Part A and Part B?
Yes. Each wrong answer in Part A and Part B costs 0.5 marks, and each correct answer earns 2 marks.
3. Why do some websites say Part C has no negative marking?
They usually copy older CSIR scheme documents or mix up rules from other subjects. The recent pattern reported for Life Sciences includes negative marking in all three parts. Always verify with the current information bulletin.
4. What is the CSIR NET Life Science JRF cutoff for June 2026?
The UR JRF cutoff is 66.500 percent. For other categories it is 59.250 (EWS), 58.000 (OBC), 49.500 (SC), 44.750 (ST) and 30.750 (PwD).
5. What is the Assistant Professor cutoff in Life Science for June 2026?
For UR it is 59.850 percent. The other categories are 53.325 (EWS), 52.200 (OBC), 44.550 (SC), 40.275 (ST) and 27.675 (PwD).
6. What is the minimum score required to qualify for PhD only in Life Science?
For June 2026 the UR cutoff is 50.250 percent. The basic benchmark is 33 percent for General, EWS and OBC, and 25 percent for SC, ST and PwD.
7. Is there a separate cutoff for Part A, B and C?
No. The official notice states that cumulative marks are considered and there is no separate sectional cutoff.
8. How many questions should I attempt in Part C?
You are required to answer 25. Choose only the ones where your confidence is above about 20 percent, and prefer questions where you can eliminate at least two options.
9. Is guessing in Part C a good idea?
Blind guessing at 25 percent odds has a slightly positive expected value, but informed elimination is far better. Never guess on questions where you cannot eliminate anything if you still have safer choices left.
10. Has the Life Science cutoff increased in 2026?
Yes. The UR JRF cutoff rose from 51.50 percent in June 2025 to 66.50 percent in June 2026, according to the official figures reported by education portals.
11. Is the negative marking the same in all CSIR NET subjects?
No. It varies by subject and part. For example, one portal reports 33 percent negative marking in Part C for Earth Sciences, but 25 percent in all parts for Life Sciences.
12. Which coaching is suggested for CSIR NET Life Science and what is the fee?
This article references Chandu Biology Classes. The fee is ₹25,000 for online and ₹30,000 for offline, with no other charges included.
Final Thoughts
So, is there negative marking in CSIR NET Life Science Part C? Yes: 4 marks for a right answer, 1 mark lost for a wrong one, and nothing lost for a skipped question. The 4 to 1 ratio gives you a clean rule of thumb: attempt when you are more than 20 percent sure, and try to be much surer than that.
With the June 2026 UR JRF cutoff at 66.5 percent and the Assistant Professor cutoff at 59.85 percent, accuracy matters more than volume. Build your preparation around clean concepts, timed mocks with the real marking scheme and honest tracking of your accuracy. If you want guided support, Chandu Biology Classes is available at ₹25,000 online and ₹30,000 offline.
Now go back to your last mock, count your wrong answers in Part C and calculate how many marks they cost you. That number is your fastest improvement target.
Disclaimer: All information in this article has been collected from publicly available internet sources, including education portals and published CSIR NET cutoff notices, and is shared for general guidance only. Exam patterns, marking schemes, cutoffs, dates and coaching fees can change. We do not claim official authority and are not responsible for any errors, omissions or decisions taken based on this content. Please verify all details from the official NTA and CSIR HRDG websites and directly from Chandu Biology Classes before acting on them.
Notes for you, not part of the article:
- I checked the marking scheme and cutoffs against several current sources. Older sites contradict each other on Part C, so I explained that conflict in the article instead of hiding it.
- I could not find a verified breakdown of Chandu Biology Classes results or faculty, so I did not invent any. Only the fees you gave me and the cutoff guide page I found are mentioned. Add real batch details if you have them.
- I avoided hyphens between words as you asked. The exact phrase “Is there negative marking in CSIR NET Life Science Part C?” appears in the title, the introduction, one heading and the final thoughts. It appears once more in that form in the meta description.
- Word count is estimated near the 3,000 to 3,500 target, but please paste it into a counter before publishing.
- No one can guarantee a first page Google ranking. To improve your chances, add a few internal links, publish the FAQ as FAQ schema and refresh the cutoff tables when new data arrives.
