Chapter 2: Cell – The Building Block of Life
MCQ Questions (1–75)
1. Who discovered the cell?
A) Darwin
B) Mendel
C) Robert Hooke
D) Newton
2. In which year did Robert Hooke discover cells?
A) 1565
B) 1665
C) 1765
D) 1865
3. Robert Hooke observed cells in:
A) Blood
B) Leaf
C) Cork
D) Root
4. The basic unit of life is:
A) Tissue
B) Organ
C) Cell
D) Organ System
5. Organisms made of a single cell are called:
A) Multicellular
B) Unicellular
C) Colonial
D) Complex
6. Amoeba is a:
A) Plant
B) Fungus
C) Unicellular Organism
D) Virus
7. Bacteria are:
A) Multicellular
B) Unicellular
C) Acellular
D) None
8. Human beings are:
A) Unicellular
B) Acellular
C) Multicellular
D) Colonial
9. A group of similar cells forms:
A) Organ
B) Tissue
C) Organ System
D) Organism
10. Several tissues together form:
A) Cell
B) Nucleus
C) Organ
D) Molecule
11. Several organs together form:
A) Tissue
B) Organ System
C) Cell
D) Atom
12. The smallest structural and functional unit of life is:
A) Tissue
B) Organ
C) Cell
D) System
13. The ability to distinguish two nearby objects separately is called:
A) Reflection
B) Magnification
C) Resolution
D) Refraction
14. The limit of resolution of the human eye is:
A) 1 mm
B) 0.1 mm
C) 10 mm
D) 0.01 mm
15. Cells are generally observed using a:
A) Telescope
B) Microscope
C) Binocular
D) Thermometer
16. The study of cells is called:
A) Cytology
B) Zoology
C) Botany
D) Ecology
17. Which lens is used in a microscope?
A) Concave Lens
B) Convex Lens
C) Plane Mirror
D) Prism
18. The microscope used in schools is:
A) Electron Microscope
B) Light Microscope
C) Radio Microscope
D) X-ray Microscope
19. Which microscope has the highest magnification?
A) Hand Lens
B) Light Microscope
C) Electron Microscope
D) Magnifying Glass
20. The control center of the cell is:
A) Cytoplasm
B) Cell Membrane
C) Nucleus
D) Ribosome
21. The jelly-like substance inside a cell is:
A) Cytoplasm
B) Nucleus
C) Cell Wall
D) Vacuole
22. The nucleus contains:
A) Water
B) Genetic Material
C) Air
D) Minerals
23. The outer covering of an animal cell is:
A) Cell Wall
B) Cell Membrane
C) Cytoplasm
D) Nucleus
24. Cell wall is present in:
A) Animal Cells
B) Plant Cells
C) Human Cells
D) Blood Cells
25. The cell membrane is:
A) Living
B) Non-living
C) Dead
D) Hard
26. The powerhouse of the cell is:
A) Nucleus
B) Ribosome
C) Mitochondria
D) Vacuole
27. Mitochondria help in:
A) Digestion
B) Respiration
C) Reproduction
D) Excretion
28. Ribosomes help in:
A) Protein Synthesis
B) Respiration
C) Movement
D) Excretion
29. Vacuoles store:
A) Food and Water
B) Oxygen
C) Carbon Dioxide
D) DNA
30. Large vacuoles are found in:
A) Animal Cells
B) Plant Cells
C) Bacteria
D) Viruses
31. Green pigment in plants is:
A) Hemoglobin
B) Chlorophyll
C) Melanin
D) Keratin
32. Chlorophyll is present in:
A) Nucleus
B) Mitochondria
C) Chloroplast
D) Vacuole
33. Chloroplast helps in:
A) Respiration
B) Photosynthesis
C) Digestion
D) Excretion
34. The cell wall is mainly made of:
A) Protein
B) Cellulose
C) Fat
D) Starch
35. Which cell lacks a cell wall?
A) Plant Cell
B) Animal Cell
C) Bacterial Cell
D) Fungal Cell
36. The shape of Amoeba is:
A) Fixed
B) Irregular
C) Round
D) Rectangular
37. Which organism has no true nucleus?
A) Amoeba
B) Bacteria
C) Human
D) Paramecium
38. The smallest living unit is:
A) Atom
B) Molecule
C) Cell
D) Tissue
39. Cells arise from:
A) Air
B) Water
C) Pre-existing Cells
D) Soil
40. Cell division helps in:
A) Growth
B) Repair
C) Reproduction
D) All of These
41. The largest cell in the human body is:
A) Nerve Cell
B) Ovum
C) RBC
D) WBC
42. The longest cell in the human body is:
A) Nerve Cell
B) RBC
C) Muscle Cell
D) WBC
43. Red Blood Cells transport:
A) Water
B) Oxygen
C) Food
D) Hormones
44. White Blood Cells help in:
A) Digestion
B) Immunity
C) Respiration
D) Reproduction
45. The basic unit of heredity is:
A) Gene
B) Tissue
C) Organ
D) Cell Wall
46. Chromosomes are present in:
A) Cytoplasm
B) Nucleus
C) Cell Wall
D) Vacuole
47. Which organelle contains DNA?
A) Nucleus
B) Ribosome
C) Vacuole
D) Cell Wall
48. The outermost layer of plant cells is:
A) Cell Membrane
B) Cytoplasm
C) Cell Wall
D) Nucleus
49. Cells were named by:
A) Darwin
B) Hooke
C) Leeuwenhoek
D) Pasteur
50. Which is a unicellular organism?
A) Human
B) Mango Tree
C) Amoeba
D) Dog
51. Which is multicellular?
A) Amoeba
B) Bacteria
C) Human
D) Yeast
52. Yeast is:
A) Unicellular
B) Multicellular
C) Acellular
D) None
53. Fish egg can be seen:
A) Only by Microscope
B) By Naked Eye
C) By Telescope
D) None
54. Most plant cells are:
A) Microscopic
B) Macroscopic
C) Huge
D) Invisible
55. Viruses are smaller than:
A) Cells
B) Atoms
C) Molecules
D) Water
56. Ribosomes are responsible for:
A) Protein Formation
B) Food Storage
C) Respiration
D) Excretion
57. Cell membrane is:
A) Selectively Permeable
B) Impermeable
C) Transparent Only
D) Hard
58. Which cell organelle stores water?
A) Vacuole
B) Ribosome
C) Nucleus
D) Mitochondria
59. Thermophiles are:
A) Heat-loving Bacteria
B) Plants
C) Animals
D) Fungi
60. Life is believed to have originated in:
A) Air
B) Water
C) Soil
D) Space
61. Cytoplasm is found:
A) Outside Cell
B) Inside Cell
C) Outside Nucleus Only
D) None
62. Cells help in:
A) Growth
B) Reproduction
C) Repair
D) All of These
63. Which is not a cell organelle?
A) Nucleus
B) Mitochondria
C) Ribosome
D) Tissue
64. Plant cells are generally:
A) Rectangular
B) Irregular
C) Round Only
D) Star-shaped
65. Animal cells are generally:
A) Fixed Shape
B) Irregular Shape
C) Rectangular
D) Square
66. Cell wall provides:
A) Support
B) Protection
C) Shape
D) All of These
67. The smallest bacteria measure about:
A) 100 nm
B) 1 mm
C) 1 cm
D) 1 m
68. Ribosomes are found in:
A) Cytoplasm
B) Nucleus Only
C) Cell Wall
D) Vacuole
69. The first living membrane is believed to have formed around:
A) Proteins
B) Organic Molecules
C) Metals
D) Rocks
70. Cell theory states that:
A) All living organisms are made of cells
B) Plants are made of tissues
C) Animals are made of organs
D) None
71. Which is visible to the naked eye?
A) Atom
B) Ribosome
C) Chicken Egg
D) Bacteria
72. The respiratory system is an example of:
A) Tissue
B) Organ
C) Organ System
D) Cell
73. Cells communicate with each other through:
A) Cell Signals
B) Roots
C) Wings
D) Fins
74. The invention of microscopes helped scientists:
A) Study Cells
B) Study Stars
C) Measure Rainfall
D) Measure Wind
75. Cell is called the building block of life because:
A) All living organisms are made of cells
B) It is the largest unit
C) It is non-living
D) It cannot divide
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