IISER Exam Pattern 2026 – Total Marks, Questions, Duration & Negative Marking Explained

The IISER Aptitude Test (IAT) is the national-level entrance exam for admission to the highly prestigious Indian Institutes of Science Education and Research. Known for promoting high-quality scientific education and research, IISERs select students through a rigorous exam that evaluates conceptual clarity and analytical skills in Physics, Chemistry, Mathematics, and Biology

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IISER Exam Pattern 2026 – Overview

ComponentDetails
Exam ModeOnline (Computer-Based Test)
Question TypeMultiple Choice Objective Type (MCQs
Total Questions60 Questions
Total Marks240 Marks
ComponentDetails
Exam Duration3 Hours
Negative Marking-1 mark for each incorrect answer

IISER 2026 Paper Pattern

SubjectNo. of Questions
Physics15 questions
Chemistry15 Questions
Mathematics15 Questions
Biology15 Questions

Total Marks & Marking Scheme

Each subject carries 60 marks, making the paper total 240 marks.

IISER 2026 Subject-wise Distribution of Questions & Marks

SubjectNumber of QuesƟonsTotal Marks
Physics1560
Chemistry1560
Mathematics1560
Biology1560
Total 60240

This uniform structure helps students plan their preparation by giving equal weightage to all four major science subjects.

IISER Exam Duration 2026

Negative Marking in IISER 2026

Final Thoughts – Prepare Smart with Synthesis

The IISER exam is designed to test deep understanding rather than rote learning. With a balanced question distribution and a challenging marking scheme, students must prepare with: Strong NCERT fundamentals Regular practice tests Systematic revision strategy Subject-wise time management