Extra 40 multiple-choice questions (MCQs) with answers from the chapter:5 "The Fundamental Unit of Life" for Class 9 CBSE Science:-
Who discovered the cell?
a) Robert Hooke
b) Anton van Leeuwenhoek
c) Schleiden and Schwann
d) Robert Brown
Answer:
a) Robert Hooke
What is the basic unit of life?
a) Atom
b) Molecule
c) Cell
d) Tissue
Answer:
c) Cell
Which of the following is a single-celled organism?
a) Amoeba
b) Hydra
c) Paramecium
d) Both a and c
Answer:
d) Both a and c
Which cell organelle is called the "Powerhouse of the cell"?
a) Nucleus
b) Mitochondria
c) Ribosome
d) Golgi apparatus
Answer:
b) Mitochondria
Which of the following is not present in an animal cell?
a) Nucleus
b) Mitochondria
c) Cell wall
d) Golgi apparatus
Answer:
c) Cell wall
What is the function of the nucleus?
a) Digestion
b) Protein synthesis
c) Control of cell activities
d) Photosynthesis
Answer:
c) Control of cell activities
What is the function of ribosomes?
a) Protein synthesis
b) Lipid synthesis
c) Energy production
d) Transport of materials
Answer:
a) Protein synthesis
The semi-permeable membrane of the cell is called:
a) Nuclear membrane
b) Plasma membrane
c) Cytoplasm
d) Cell wall
Answer:
b) Plasma membrane
Which organelle helps in the process of photosynthesis?
a) Mitochondria
b) Chloroplast
c) Ribosome
d) Lysosome
Answer:
b) Chloroplast
Which structure is responsible for packaging and transport of materials inside the cell?
a) Endoplasmic reticulum
b) Ribosome
c) Golgi apparatus
d) Mitochondria
Answer:
c) Golgi apparatus
Which organelle is known as the "suicidal bag" of the cell?
a) Mitochondria
b) Ribosome
c) Lysosome
d) Golgi apparatus
Answer:
c) Lysosome
The outermost layer of a plant cell is called:
a) Cell wall
b) Plasma membrane
c) Cytoplasm
d) Nucleus
Answer:
a) Cell wall
Which of the following is NOT found in prokaryotic cells?
a) Nucleus
b) Cell membrane
c) Ribosome
d) Cytoplasm
Answer:
a) Nucleus
Which of these organelles is responsible for detoxifying poisons in the cell?
a) Ribosomes
b) Lysosomes
c) Endoplasmic reticulum
d) Golgi apparatus
Answer:
c) Endoplasmic reticulum
What is cytoplasm?
a) A gel-like substance inside the cell
b) The outer covering of the cell
c) The powerhouse of the cell
d) The control
centre
of the cell
Answer:
a) A gel-like substance inside the cell
Which part of the cell stores genetic material?
a) Cytoplasm
b) Nucleus
c) Mitochondria
d) Ribosome
Answer:
b) Nucleus
The process by which a cell engulfs solid particles is called:
a) Osmosis
b) Phagocytosis
c) Diffusion
d) Pinocytosis
Answer:
b) Phagocytosis
Which organelle helps in the formation of lysosomes?
a) Mitochondria
b) Golgi apparatus
c) Ribosomes
d) Nucleus
Answer:
b) Golgi apparatus
Which of the following is selectively permeable?
a) Cell wall
b) Cell membrane
c) Ribosome
d) Cytoplasm
Answer:
b) Cell membrane
What is the function of the vacuole in plant cells?
a) Digestion
b) Storage of food and water
c) Protein synthesis
d) Energy production
Answer:
b) Storage of food and water
Which process involves movement of molecules from high to low concentration?
a) Active transport
b) Diffusion
c) Osmosis
d) Phagocytosis
Answer:
b) Diffusion
The process by which water moves through a semi-permeable membrane is called:
a) Osmosis
b) Diffusion
c) Endocytosis
d) Phagocytosis
Answer:
a) Osmosis
Which organelle produces ATP?
a) Mitochondria
b) Chloroplast
c) Ribosome
d) Lysosome
Answer:
a) Mitochondria
Which of the following helps in cell division?
a) Nucleus
b) Centrosome
c) Ribosome
d) Chloroplast
Answer:
b) Centrosome
Which of the following organelles is absent in bacteria?
a) Ribosome
b) Nucleus
c) Cell membrane
d) Cytoplasm
Answer:
b) Nucleus
Plastids are found in:
a) Animal cells
b) Plant cells
c) Both plant and animal cells
d) Bacteria
Answer:
b) Plant cells
Which of these is a function of the cell wall?
a) Provides shape and support
b) Controls the entry of substances
c) Produces energy
d) Synthesizes proteins
Answer:
a) Provides shape and support
Which of the following statements about lysosomes is incorrect?
a) They contain digestive enzymes
b) They help break down waste materials
c) They produce ATP
d) They are known as suicidal bags
Answer:
c) They produce ATP
Which of the following organisms have cell walls?
a) Animals
b) Plants
c) Fungi
d) Both b and c
Answer:
d) Both b and c
Who discovered the nucleus?
a) Robert Hooke
b) Robert Brown
c) Anton van Leeuwenhoek
d) Watson and Crick
Answer:
b) Robert Brown
31. Which part of the cell contains the hereditary material?
a) Ribosome
b) Mitochondria
c) Nucleus
d) Endoplasmic Reticulum
Answer: c) Nucleus
32. Name the organelle responsible for photosynthesis.
a) Mitochondria
b) Golgi apparatus
c) Chloroplast
d) Lysosome
Answer: c) Chloroplast
33. What is the main function of mitochondria?
a) Storage of food
b) Photosynthesis
c) ATP production
d) Transport of proteins
Answer: c) ATP production
34. What is the basic structural and functional unit of life?
a) Organ
b) Tissue
c) Cell
d) Organ system
Answer: c) Cell
35. What is the function of the endoplasmic reticulum?
a) Protein synthesis
b) Transport of materials
c) Digestion
d) Photosynthesis
Answer: b) Transport of materials
36. Which organelle is responsible for intracellular digestion?
a) Ribosome
b) Lysosome
c) Mitochondria
d) Vacuole
Answer: b) Lysosome
37. What is the name of the outermost covering in a plant cell?
a) Cell wall
b) Plasma membrane
c) Nuclear membrane
d) Cytoplasm
Answer: a) Cell wall
38. What is the function of Golgi bodies?
a) Packaging and transport of proteins
b) Cellular respiration
c) Photosynthesis
d) Digestion
Answer: a) Packaging and transport of proteins
39. Name the jelly-like substance inside a cell.
a) Nucleus
b) Cytoplasm
c) Mitochondria
d) Ribosome
Answer: b) Cytoplasm
40. What is the smallest unit of life?
a) Cell
b) Tissue
c) Organ
d) Organ system
Answer: a) Cell
