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Class 9 Science — Chapter 5: The Fundamental Unit of Life

90 practice questions · 30 Easy · 30 Medium · 30 Hard

Free NCERT-aligned multiple-choice practice for Class 9 Science, Chapter 5 (The Fundamental Unit of Life). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.

Sample questions

Q1Easy

Cells were first discovered by:

A.Robert Hooke✓ correct
B.Anton van Leeuwenhoek
C.Schleiden
D.Schwann
Why

Robert Hooke (1665) observed cells in cork using a compound microscope.

Q2Medium

The control centre of a eukaryotic cell is the:

A.Nucleus✓ correct
B.Ribosome
C.Golgi
D.Vacuole
Why

Nucleus contains DNA — it controls cellular activities.

Q3Hard

When a cell is placed in a hypertonic solution, it will:

A.Swell up
B.Shrink (plasmolyse)✓ correct
C.Burst
D.Stay the same
Why

Water leaves the cell by osmosis (toward higher solute concentration outside) → cell shrinks.

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