Courses
By Karan Singh Bisht
|
Updated on 17 Jul 2026, 13:03 IST
Cell the Building Blocks of Life Class 9 MCQ is created to help students revise Chapter 2 of Class 9 Science in a simple, quick, and exam-focused way. The aim is to make important concepts such as the basic unit of life, cell structure, types of cells, cell organelles, diffusion, osmosis, and cell division easier to understand through multiple-choice questions.
The content is prepared using the latest Class 9 Science syllabus 2026-27 academic session and the important topics covered in Chapter 2, Cell: The Building Block of Life. Each MCQ is written in a student-friendly format with the correct answer and easy explanation so that students can understand the concept instead of only memorizing the answer.
These MCQs are useful for Class 9 students who want to practice chapter-wise questions for homework, class tests, unit tests, quick revision, and school exam preparation. Teachers and parents can also use this resource to help students check their understanding and improve accuracy in objective-type questions. At Infinity Learn, the class 9 science MCQs are prepared and reviewed by Infinity Learn expert teachers to ensure accuracy, clarity, and syllabus alignment.
Class 9 Chapter 2 Cell: The Building Block of Life introduces students to the smallest structural and functional unit of living organisms. All living things, whether plants, animals, or microorganisms, are made up of cells. This chapter helps students understand how cells perform important life processes and how different parts of a cell work together.
| Topic | What Students Learn |
| Cell | Basic structural and functional unit of life |
| Cell theory | Living organisms are made of cells |
| Prokaryotic cells | Cells without a well-defined nucleus |
| Eukaryotic cells | Cells with a well-defined nucleus |
| Plant cell | Cell with cell wall, chloroplasts, and large vacuole |
| Animal cell | Cell without cell wall and chloroplasts |
| Cell organelles | Parts of a cell that perform specific functions |
| Diffusion | Movement of particles from higher to lower concentration |
| Osmosis | Movement of water through a semipermeable membrane |
| Cell division | Process through which cells multiply |
Cell: The Building Block of Life Class 9 MCQs are prepared to help students revise key concepts quickly and practice effectively for school exams, unit tests, and annual examinations. These MCQs cover all important topics from the chapter, helping students check their understanding, improve accuracy, and build confidence in Science.
1. Life is widely accepted to have originated in which medium?
Loading PDF...
A. Air
B. Soil
C. Water
D. Fire
Answer: C. Water
2. Heat-loving bacteria found in hot springs are called:
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
A. Mesophiles
B. Thermophiles
C. Pathogens
D. Viroids
Answer: B. Thermophiles
3. The hot springs of Puga Valley are located in:
A. Rajasthan
B. Ladakh
C. Assam
D. Kerala
Answer: B. Ladakh
4. The basic structural and functional unit of life is:
A. Tissue
B. Organ
C. Cell
D. Organ system
Answer: C. Cell
5. Organisms made up of only one cell are called:
A. Multicellular organisms
B. Unicellular organisms
C. Acellular organisms
D. Colonial organisms
Answer: B. Unicellular organisms
6. A group of similar cells performing similar functions forms a:
A. Tissue
B. Organ
C. Organ system
D. Nucleus
Answer: A. Tissue
7. The limit of resolution of the human eye is about:
A. 1 mm
B. 0.1 mm
C. 10 mm
D. 100 mm
Answer: B. 0.1 mm
8. The near point of the human eye is approximately:
A. 10 cm
B. 15 cm
C. 25 cm
D. 50 cm
Answer: C. 25 cm
9. Who first observed cells in 1665?
A. Rudolf Virchow
B. Robert Hooke
C. Theodor Schwann
D. Matthias Schleiden
Answer: B. Robert Hooke
10. Robert Hooke observed cells in a thin slice of:
A. Onion peel
B. Cork
C. Leaf
D. Cheek tissue
Answer: B. Cork
11. A light microscope uses which of the following for magnification?
A. Sound waves
B. Magnetic field
C. Convex lenses
D. X-rays
Answer: C. Convex lenses
12. If the eyepiece has 10X magnification and the objective lens has 10X magnification, the total magnification is:
A. 10X
B. 20X
C. 50X
D. 100X
Answer: D. 100X
13. One millimetre is equal to:
A. 10 micrometres
B. 100 micrometres
C. 1000 micrometres
D. 10,000 micrometres
Answer: C. 1000 micrometres
14. Electron microscopes use a beam of:
A. Light
B. Electrons
C. Water molecules
D. Sound waves
Answer: B. Electrons
15. The cell membrane is also called the:
A. Cell wall
B. Plasma membrane
C. Nuclear membrane
D. Cytoplasm
Answer: B. Plasma membrane
16. The cell membrane is described as selectively permeable because it:
A. Allows all substances to pass through
B. Blocks all substances
C. Allows only some substances to pass through
D. Allows only solids to pass through
Answer: C. Allows only some substances to pass through
17. The cell membrane is mainly made up of:
A. Cellulose and starch
B. Lipids and proteins
C. Sugar and salt
D. DNA and RNA
Answer: B. Lipids and proteins
18. The structure of the cell membrane is explained by the:
A. Cell theory
B. Fluid-mosaic model
C. Chromosome theory
D. Germ theory
Answer: B. Fluid-mosaic model
19. The movement of water through a selectively permeable membrane is called:
A. Diffusion
B. Osmosis
C. Respiration
D. Photosynthesis
Answer: B. Osmosis
20. Diffusion is the movement of particles from:
A. Lower concentration to higher concentration
B. Higher concentration to lower concentration
C. Solid state to liquid state
D. Liquid state to gaseous state only
Answer: B. Higher concentration to lower concentration
21. When a potato piece is placed in plain water, it:
A. Shrinks
B. Swells
C. Burns
D. Dissolves completely
Answer: B. Swells
22. When a potato piece is placed in a concentrated salt solution, it:
A. Swells
B. Shrinks
C. Turns into gas
D. Becomes green
Answer: B. Shrinks
23. A solution having the same solute concentration as the cell interior is called:
A. Isotonic solution
B. Hypotonic solution
C. Hypertonic solution
D. Acidic solution
Answer: A. Isotonic solution
24. A solution with lower solute concentration than the cell interior is called:
A. Hypertonic solution
B. Hypotonic solution
C. Isotonic solution
D. Saturated solution
Answer: B. Hypotonic solution
25. A solution with higher solute concentration than the cell interior is called:
A. Isotonic solution
B. Hypotonic solution
C. Hypertonic solution
D. Neutral solution
Answer: C. Hypertonic solution
26. The cell wall is present in:
A. Plant cells only
B. Animal cells only
C. Plant, fungi, and bacterial cells
D. Human cheek cells only
Answer: C. Plant, fungi, and bacterial cells
27. The plant cell wall is mainly made up of:
A. Protein
B. Cellulose
C. Lipid
D. Chlorophyll
Answer: B. Cellulose
28. Animal cells do not have:
A. Cell membrane
B. Cytoplasm
C. Nucleus
D. Cell wall
Answer: D. Cell wall
29. Onion peel cells generally appear:
A. Irregularly arranged
B. Box-shaped and regularly arranged
C. Round and scattered
D. Without boundaries
Answer: B. Box-shaped and regularly arranged
30. Human cheek cells are generally:
A. Box-shaped and regularly arranged
B. Irregularly arranged
C. Surrounded by a cell wall
D. Without cytoplasm
Answer: B. Irregularly arranged
31. The jelly-like substance inside the cell is called:
A. Cell wall
B. Cytoplasm
C. Chloroplast
D. Chromosome
Answer: B. Cytoplasm
32. A bacterial cell is an example of a:
A. Eukaryotic cell
B. Prokaryotic cell
C. Dead cell
D. Multinucleate cell
Answer: B. Prokaryotic cell
33. Prokaryotic cells do not have:
A. Cell membrane
B. Cytoplasm
C. Well-defined nucleus
D. Genetic material
Answer: C. Well-defined nucleus
34. Eukaryotic cells have:
A. No nucleus
B. A well-defined nucleus
C. No cell membrane
D. No cytoplasm
Answer: B. A well-defined nucleus
35. The genetic material in prokaryotic cells is present in a region called:
A. Nucleus
B. Nucleoid
C. Vacuole
D. Lysosome
Answer: B. Nucleoid
36. Ribosomes are known as:
A. Powerhouses of the cell
B. Protein factories
C. Storage sacs
D. Clean-up systems
Answer: B. Protein factories
37. The nucleus is called the house of coded instructions because it contains:
A. Cell sap
B. Chlorophyll
C. DNA
D. Starch
Answer: C. DNA
38. Functional segments of DNA are called:
A. Genes
B. Vacuoles
C. Lysosomes
D. Cristae
Answer: A. Genes
39. The dense round body inside the nucleus is called:
A. Nucleolus
B. Cell wall
C. Golgi body
D. Vacuole
Answer: A. Nucleolus
40. Mature human red blood cells lack:
A. Cell membrane
B. Haemoglobin
C. Nucleus
D. Cytoplasm
Answer: C. Nucleus
41. Rough Endoplasmic Reticulum appears rough because it has:
A. Chloroplasts attached
B. Ribosomes attached
C. Vacuoles attached
D. Lysosomes attached
Answer: B. Ribosomes attached
42. Smooth Endoplasmic Reticulum is mainly involved in the synthesis and storage of:
A. Fats and hormones
B. DNA only
C. Cellulose only
D. Water only
Answer: A. Fats and hormones
43. The Golgi apparatus acts like the cell’s:
A. Power station
B. Post office
C. Control room
D. Outer wall
Answer: B. Post office
44. Lysosomes are known as the clean-up system because they:
A. Produce oxygen
B. Store starch
C. Break down waste and damaged cell parts
D. Control inheritance
Answer: C. Break down waste and damaged cell parts
45. Mitochondria are called the powerhouse of the cell because they produce:
A. Chlorophyll
B. ATP
C. Cellulose
D. Starch
Answer: B. ATP
46. The finger-like folds of the inner membrane of mitochondria are called:
A. Cristae
B. Stroma
C. Chromatin
D. Ribosomes
Answer: A. Cristae
47. Chloroplasts help in:
A. Protein synthesis
B. Photosynthesis
C. Waste digestion
D. Cell division only
Answer: B. Photosynthesis
48. Plastids that give yellow, orange, or red colours to flowers and fruits are called:
A. Chloroplasts
B. Chromoplasts
C. Leucoplasts
D. Lysosomes
Answer: B. Chromoplasts
49. Colourless plastids that store food materials are called:
A. Leucoplasts
B. Chromoplasts
C. Chloroplasts
D. Mitochondria
Answer: A. Leucoplasts
50. Mitosis produces:
A. Four genetically different daughter cells
B. Two genetically identical daughter cells
C. One daughter cell with half chromosomes
D. Only gametes
Answer: B. Two genetically identical daughter cells
The MCQs from this chapter cover all major concepts that students need to revise before exams.
This topic explains how the cell was discovered and why it is considered the basic unit of life.
Important points include:
Cell theory explains the basic idea of how life is organized.
Key points include:
Students learn about different types of cells based on structure.
| Type of Cell | Meaning |
| Prokaryotic cell | Cell without a well-defined nucleus |
| Eukaryotic cell | Cell with a well-defined nucleus |
| Unicellular organism | Organism made of one cell |
| Multicellular organism | Organism made of many cells |
This topic helps students compare plant and animal cells.
| Feature | Plant Cell | Animal Cell |
| Cell wall | Present | Absent |
| Cell membrane | Present | Present |
| Nucleus | Present | Present |
| Chloroplast | Present | Absent |
| Vacuole | Large | Small or temporary |
| Shape | Usually fixed | Usually irregular |
Cell organelles are specialized parts of a cell. Each organelle performs a specific function.
| Cell Organelle | Function |
| Nucleus | Controls cell activities |
| Mitochondria | Produces energy for the cell |
| Ribosomes | Help in protein synthesis |
| Endoplasmic reticulum | Helps in transport of materials inside the cell |
| Golgi apparatus | Packages and transports substances |
| Lysosomes | Help in digestion of waste materials |
| Vacuole | Stores food, water, and waste materials |
| Chloroplast | Helps in photosynthesis in plant cells |
Diffusion and osmosis are important processes that help substances move in and out of cells.
| Process | Meaning |
| Diffusion | Movement of particles from higher concentration to lower concentration |
| Osmosis | Movement of water through a semipermeable membrane from higher water concentration to lower water concentration |
Cell division is the process by which cells multiply. It is important for growth, repair, and reproduction.
Important points include:
No courses found
Yes, cells are called the building blocks of life because all living organisms are made up of cells. The cell is the basic structural and functional unit of life. Some organisms, like bacteria and yeast, are unicellular, while plants, animals, and humans are multicellular.
Yes, Class 9 Science MCQs are important because they help students revise key concepts quickly, practise objective-type questions, and check their understanding before exams. Infinity Learn provides chapter-wise MCQs with answers and explanations to help students prepare better for school tests and annual exams.
The four major building blocks of cells are:
These biomolecules help cells perform important functions such as energy production, growth, repair, storage, and inheritance.
The seven common characteristics or components of life are:
The four building blocks of life usually refer to the four major biomolecules found in living organisms: carbohydrates, proteins, lipids, and nucleic acids. These molecules form cell structures, provide energy, control body functions, and carry genetic information.
Cell the Building Blocks of Life Class 9 MCQ is a chapter-wise practice resource that includes multiple-choice questions from Class 9 Science Chapter 2, Cell: The Building Block of Life.
Yes, these MCQs are useful for school exams, unit tests, class tests, and quick revision. They help students practise important objective-type questions from the chapter.
Yes, students can download the Cell the Building Blocks of Life Class 9 MCQ PDF from Infinity Learn for offline practice and revision.
Students can use Infinity Learn because the MCQs are prepared and reviewed by expert teachers. The questions are written in simple language and are designed to support concept clarity, exam preparation, and effective revision.
The MCQs cover cell discovery, cell theory, prokaryotic and eukaryotic cells, plant and animal cells, cell organelles, diffusion, osmosis, and cell division.