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Class 8 Practice – Level 1 – Cell Structure and Functions
Total questions: 40
1.
Who is credited with the discovery of cells by observing a thin slice of cork under a microscope?
Anton van Leeuwenhoek
Robert Hooke
Matthias Schleiden
Theodor Schwann
None
2.
What did Robert Hooke observe under the microscope that led to the discovery of cells?
Living cells in pond water
Thin slice of cork
Onion cells
Bacteria
None
3.
The term "cell" was first coined by:
Theodor Schwann
Matthias Schleiden
Anton van Leeuwenhoek
Robert Hooke
None
4.
Which scientist was the first to observe living cells under a microscope?
Robert Hooke
Anton van Leeuwenhoek
Rudolf Virchow
Robert Brown
None
5.
In which year did Robert Hooke discover cells?
1600
1665
1750
1825
None
6.
Which of the following scientists contributed to the cell theory by stating that all plants are made of cells?
Rudolf Virchow
Theodor Schwann
Matthias Schleiden
Anton van Leeuwenhoek
None
7.
What did Anton van Leeuwenhoek refer to the tiny living organisms he observed in pond water as?
Animalcules
Cells
Microbes
Nuclei
None
8.
Who first proposed that new cells arise from the division of pre-existing cells?
Matthias Schleiden
Theodor Schwann
Rudolf Virchow
Anton van Leeuwenhoek
None
9.
What type of microscope did Robert Hooke use to discover cells?
Electron microscope
Compound microscope
Simple microscope
Digital microscope
None
10.
Which two scientists proposed the cell theory?
Robert Hooke and Anton van Leeuwenhoek
Rudolf Virchow and Robert Brown
Matthias Schleiden and Theodor Schwann
Charles Darwin and Gregor Mendel
None
11.
Which scientist made significant improvements to the microscope and observed bacteria for the first time?
Robert Hooke
Anton van Leeuwenhoek
Rudolf Virchow
Matthias Schleiden
None
12.
Which of the following is NOT a part of the cell theory?
All living organisms are composed of cells
Cells are the basic unit of life
Cells are spontaneously generated
All cells arise from pre-existing cells
None
13.
Who added the idea that all cells come from pre-existing cells to the cell theory?
Robert Hooke
Anton van Leeuwenhoek
Rudolf Virchow
Theodor Schwann
None
14.
Which of the following statements is part of the modern cell theory?
Cells can arise from non-living matter
The cell is the basic unit of structure and function in organisms
All cells have a cell wall
Viruses are living cells
None
15.
According to the cell theory, what is the smallest unit of life?
Atom
Organelle
Cell
Tissue
None
16.
Which of the following scientists contributed to the cell theory by studying animal tissues?
Matthias Schleiden
Theodor Schwann
Robert Hooke
Anton van Leeuwenhoek
None
17.
What does the cell theory state about the origin of new cells?
They are formed spontaneously
They arise from non-living material
They come from pre-existing cells
They arise from the division of atoms
None
18.
The idea that cells are the basic structural and functional unit of life was proposed by:
Rudolf Virchow
Robert Hooke
Theodor Schwann
Anton van Leeuwenhoek
None
19.
The concept "Omnis cellula e cellula," meaning all cells arise from pre-existing cells, was introduced by:
Rudolf Virchow
Robert Hooke
Matthias Schleiden
Theodor Schwann
None
20.
Which statement about the cell theory is correct?
Cells are the basic unit of life in plants only
Cells do not divide
Cells are the basic unit of structure and function in all living organisms
Viruses are considered cells according to the cell theory
None
21.
Cells are classified into prokaryotic and eukaryotic cells based on the presence or absence of which structure?
Mitochondria
Nucleus
Cell membrane
Ribosomes
None
22.
Which of the following organisms has prokaryotic cells?
Fungi
Animals
Bacteria
Plants
None
23.
In prokaryotic cells, genetic material is found in which region?
Nucleus
Nucleoid
Mitochondria
Golgi apparatus
None
24.
Which of the following is a characteristic feature of eukaryotic cells?
Absence of a cell membrane
Presence of membrane-bound organelles
Lack of ribosomes
Genetic material is located in the nucleoid
None
25.
Which type of cells are found in humans?
Prokaryotic cells
Eukaryotic cells
Both prokaryotic and eukaryotic cells
Cells without any membrane-bound organelles
None
26.
Which of the following organelles is absent in prokaryotic cells?
Ribosomes
Plasma membrane
Nucleus
Cytoplasm
None
27.
The primary difference between prokaryotic and eukaryotic cells is:
Prokaryotic cells have a cell wall, while eukaryotic cells do not
Prokaryotic cells lack membrane-bound organelles, while eukaryotic cells have them
Eukaryotic cells lack DNA
Prokaryotic cells have multiple chromosomes, while eukaryotic cells have only one
None
28.
Which of the following is an example of a eukaryotic cell?
Bacterium
Amoeba
Virus
Cyanobacteria
None
29.
Prokaryotic cells reproduce by a process called:
Mitosis
Binary fission
Meiosis
Budding
None
30.
Which of the following is a feature of eukaryotic cells but NOT of prokaryotic cells?
Cytoplasm
DNA
Ribosomes
Endoplasmic reticulum
None
31.
Which of the following organelles is involved in the synthesis of ATP in eukaryotic cells?
Chloroplast
Mitochondria
Ribosome
Golgi apparatus
None
32.
Eukaryotic cells contain which type of genetic material?
Circular DNA
Linear DNA
RNA
Plasmids
None
33.
Which structure is responsible for regulating what enters and exits a eukaryotic cell?
Cytoplasm
Cell wall
Plasma membrane
Nucleus
None
34.
What is the primary function of the ribosomes in eukaryotic cells?
DNA replication
Protein synthesis
Lipid metabolism
Energy production
None
35.
Which organelle is responsible for the modification and sorting of proteins in eukaryotic cells?
Lysosome
Golgi apparatus
Endoplasmic reticulum
Nucleus
None
36.
What is the primary function of the cell wall in plant cells?
Energy production
Protection and support
Protein synthesis
Photosynthesis
None
37.
Which of the following is a component of the plant cell wall?
Phospholipids
Cellulose
Proteins
DNA
None
38.
The nucleus is often referred to as the:
Control center of the cell
Energy factory
Protein synthesizer
Waste disposal unit
None
39.
Which structure within the nucleus is responsible for ribosome production?
Chromatin
Nucleolus
Nuclear membrane
Nucleoplasm
None
40.
In which type of cells is the cell wall found?
Animal cells only
Plant cells only
Both plant and animal cells
Bacterial cells only
None
1 out of 40
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