The Fundamental Unit of Life (9 Science)
The cell is the smallest unit of life and all living organisms are made of cells. Understanding cell structure and function is crucial to biology.
TL;DR: The cell is the smallest unit of life and all living organisms are made of cells. Understanding cell structure and function is crucial to biology.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
The cell is the smallest unit of life and all living organisms are made of cells. Understanding cell structure and function is crucial to biology.
The Fundamental Unit of Life MCQs with Answers & Explanations
Q1. What is the cell?
- Part of atom
- Basic unit of life ✓ (correct)
- Part of tissue
- Part of organ
Q2. Who discovered the cell?
- Antoine Lavoisier
- Robert Hooke ✓ (correct)
- Louis Pasteur
- Isaac Newton
Q3. What are the two main types of cells?
- Plant and animal cells
- Prokaryotic and eukaryotic cells ✓ (correct)
- Large and small cells
- Active and inactive cells
Q4. What is the control center of the cell?
- Ribosome
- Mitochondria
- Nucleus ✓ (correct)
- Cell membrane
Q5. What is the powerhouse of the cell?
- Nucleus
- Ribosome
- Mitochondria ✓ (correct)
- Chloroplast
Q6. Which organelle is responsible for photosynthesis?
- Mitochondria
- Ribosome
- Chloroplast ✓ (correct)
- Nucleus
Q7. What is the cell membrane?
- A rigid outer wall
- A flexible barrier controlling what enters and exits cell ✓ (correct)
- Inside the nucleus
- Part of cytoplasm
Q8. What is cytoplasm?
- Genetic material
- Thick fluid inside cell containing organelles ✓ (correct)
- Outside cell boundary
- Part of nucleus
Q9. Which is true of plant cells but not animal cells?
- Cell membrane
- Nucleus
- Cell wall and chloroplasts ✓ (correct)
- Mitochondria
Q10. What are ribosomes?
- Storage organelles
- Sites of protein synthesis ✓ (correct)
- Energy producers
- Genetic material
Frequently Asked Questions
What is the difference between prokaryotic and eukaryotic cells?
Prokaryotic cells (bacteria) lack a membrane-bound nucleus and organelles. Eukaryotic cells (plants, animals, fungi) have a true nucleus and membrane-bound organelles.
Why is the cell membrane called semi-permeable?
The cell membrane is semi-permeable because it allows some substances to pass through (like water and oxygen) while preventing others from entering or leaving freely.
More 9 Science MCQs
- Light Reflection and Refraction
- Electricity
- Acids Bases and Salts
- Life Processes
- Carbon and its Compounds
- Metals and Non-metals
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