Free online practice test
Biology Sectional Test 1
IISER IAT · IISER Aptitude Test 2026
Syllabus-checked original practice
Mapped to the official IAT syllabus and answer-checked on 31 August 2026.
View official syllabus sourceBefore you begin
- 1This sectional test contains 15 original Biology questions.
- 2Each wrong answer deducts marks using the scoring rule shown above. Unattempted questions score zero.
- 3You can mark a question for review and come back to it later using the question palette.
- 4The timer starts as soon as you click "Start test" and the test auto-submits when time runs out.
- 5You can review your answers and explanations for every question immediately after submitting.
About this IISER IAT Biology sectional test
This sectional test isolates Biology from the IISER IAT IAT pattern, so you can drill it on its own instead of only meeting it inside the full mock. It draws 15 original practice questions across 15 distinct topics, syllabus-checked the same as our full mocks.
Topics covered
Blood groups
1 question
Counter-current mechanism
1 question
DNA replication
1 question
Ecosystem energetics
1 question
Gene regulation
1 question
Human excretion
1 question
Immunity
1 question
Meiosis
1 question
Mendelian genetics
1 question
Photosynthesis
1 question
Photosynthetic electron transport
1 question
Plant hormones
1 question
Population ecology
1 question
Population genetics
1 question
Respiration
1 question
Scoring and result analysis
Correct answers earn 4 marks and wrong answers deduct 1 mark. Unattempted questions score zero. This section's 15 questions are difficulty-tagged: 7 easy, 7 medium, 1 hard. After submitting, you receive topic-wise accuracy, time spent, answer explanations, and source links.
Frequently asked questions
Is this an official IISER IAT question paper?
No. It's an independent practice test with original Biology questions, mapped to the official IISER IAT IAT syllabus and answer-checked on 31 August 2026.
How many questions are in this Biology sectional test, and how long is it?
15 questions in 45 minutes.
Which topics does this test focus on?
It spans 15 topics, with the heaviest coverage on Blood groups, Counter-current mechanism, and DNA replication.
Is there negative marking in this test?
Yes. Each wrong answer deducts 1 mark, and each correct answer earns 4 marks. Unattempted questions score zero.