The Cell
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Cell Theory and Discovery
SubtopicCell Theory and Discovery under The Cell for Grade 6 ICSE.
Preview questions (no answers)
- 1.
Which of the following is true for all cells?
A.They are all square in shape
B.They can all be seen without a microscope
C.They perform life-sustaining activities
D.They all move from one place to another
- 2.
The term 'Cell' comes from the Latin word 'Cella' which means:
A.A large room
B.A small room
C.A hard box
D.A liquid drop
- 3.
If you look at an onion peel under a microscope, the structures you see are:
A.Animal cells
B.Plant cells
C.Bacterial cells
D.Dust particles
- 4.
Which of these is a unicellular green alga?
A.Chlamydomonas
B.Neem
C.Moss
D.Fern
- 5.
If you are looking at a slide of an onion peel and see a grid of rectangular units, which scientist's discovery are you most likely replicating?
A.Theodor Schwann
B.Robert Hooke
C.Felix Dujardin
D.Antonie van Leeuwenhoek
- 6.
What does the 'cell theory' provide for the field of Biology?
A.A way to classify rocks
B.A fundamental unifying principle for all life sciences
C.A method to calculate the speed of light
D.A list of all extinct animals
- 7.
Why is the work of Purkinje and Dujardin important to our understanding of the 'living' nature of the cell?
A.They discovered that cells are empty
B.They discovered that the cell is filled with a living substance
C.They discovered the cell wall
D.They discovered that cells are made of minerals
- 8.
Considering the history of the microscope, why did Hooke see 'boxes' while Leeuwenhoek saw 'moving particles'?
A.Hooke used a microscope with two lenses, while Leeuwenhoek used one extremely high-quality lens.
B.Hooke was looking at dead tissue (cork) and Leeuwenhoek was looking at living fluids (pond water).
C.Leeuwenhoek used a stain called methylene blue to make the particles move.
D.Both A and B are correct factors.
- 9.
What does the term 'Omnis cellula e cellula' imply about the life cycle of organisms?
A.Life can start from non-living chemicals.
B.There is a continuous link between all living things through cell division.
C.Cells eventually turn back into dust.
D.Only the first cell ever created was important.
- 10.
Why is the discovery of the cell nucleus by Robert Brown in 1831 considered so important for the development of the Cell Theory?
A.It showed that cells were completely solid objects.
B.It provided a common internal feature that could be looked for in all types of cells.
C.It proved that cells were made of atoms.
D.It showed that the cell wall was not the most important part of the cell.
Download the worksheet for The Cell - Cell Theory and Discovery to practice offline. It includes additional chapter-level practice questions.
Structure of Plant and Animal Cells
SubtopicStructure of Plant and Animal Cells under The Cell for Grade 6 ICSE.
Preview questions (no answers)
- 1.
The size of cells is typically measured in which unit?
A.Centimeter
B.Millimeter
C.Micrometer
D.Kilometer
- 2.
Which of these structures is present in an animal cell but NOT in a plant cell?
A.Centrioles
B.Chloroplasts
C.Cell wall
D.Large central vacuole
- 3.
Which organelle is often compared to a 'storage tank' because it stores excess water?
A.Nucleus
B.Mitochondria
C.Vacuole
D.Ribosome
- 4.
Which of these is responsible for passing traits from parents to offspring?
A.Cytoplasm
B.Genes on chromosomes
C.Vacuoles
D.Cell wall
- 5.
Which of the following describes the relationship between ribosomes and the Endoplasmic Reticulum (ER)?
A.Ribosomes are destroyed by the ER.
B.Ribosomes attached to the ER give it a 'rough' appearance and synthesize proteins.
C.The ER produces ribosomes inside its tubes.
D.Ribosomes move through the SER to produce energy.
- 6.
Which statement about vacuoles is correct?
A.They are always absent in animal cells.
B.They are small and many in plant cells.
C.They store excess water, waste products, and food.
D.They are responsible for protein synthesis.
- 7.
Why is the nucleus considered the control center of the cell?
A.Because it contains the cell's energy source
B.Because it coordinates all metabolic functions and contains genetic information
C.Because it is the largest organelle in every cell
D.Because it prevents the cell from drying out
- 8.
Which of the following statements about the cell theory is the most modern addition?
A.All living things are made of cells.
B.The cell is the basic unit of life.
C.All cells arise from pre-existing cells.
D.Cells contain DNA which is passed during cell division.
- 9.
Why are lysosomes generally absent in plant cells?
A.Plant cells do not produce waste.
B.The large central vacuole in plants often performs the digestive and waste-handling functions.
C.Plant cells have cell walls that prevent lysosome formation.
D.Plant cells do not have enzymes.
- 10.
What role does the 'Middle Lamella' play in plant tissues?
A.It is the site of cellular respiration.
B.It acts as a cementing layer between the cell walls of adjacent plant cells.
C.It is the membrane that surrounds the nucleus.
D.It is the fluid that fills the space between organelles.
Download the worksheet for The Cell - Structure of Plant and Animal Cells to practice offline. It includes additional chapter-level practice questions.
Differences between Plant and Animal Cells
SubtopicDifferences between Plant and Animal Cells under The Cell for Grade 6 ICSE.
Preview questions (no answers)
- 1.
Which cell organelle is known for containing digestive enzymes in animal cells?
A.Lysosome
B.Ribosome
C.Centrosome
D.Chloroplast
- 2.
Which of the following is found in the cytoplasm of both plant and animal cells?
A.Chloroplasts
B.Mitochondria
C.Cell wall
D.Large sap vacuole
- 3.
A student looking at a slide sees cells with fixed boundaries and green structures. These are:
A.Blood cells
B.Nerve cells
C.Leaf cells
D.Muscle cells
- 4.
Which of these is a similarity between a plant cell and an animal cell?
A.Both have plastids
B.Both have a cell wall
C.Both have a cell membrane
D.Both have a large central vacuole
- 5.
Which of these is a similarity between the nucleus of a plant cell and an animal cell?
A.Both are pushed to the side by a vacuole
B.Both contain nucleoplasm and chromosomes
C.Both are only present during cell division
D.Both contain chlorophyll
- 6.
Why do plants require a cell wall while animals do not?
A.Plants move from place to place
B.Plants need to store oxygen
C.Plants need structural support to stay upright
D.Plants do not have a cell membrane
- 7.
When observing an onion peel cell, which of the following would NOT be visible even under a high-power light microscope?
A.Cell wall
B.Large vacuole
C.Centrosome
D.Nucleus
- 8.
If a student observes a cell with a cell wall but NO chloroplasts, what could it be?
A.A cheek cell
B.A root hair cell of a plant
C.A muscle cell
D.A leaf mesophyll cell
- 9.
The cell wall is made of cellulose. What is the functional benefit of this to a plant growing outdoors?
A.It allows the plant to move toward light.
B.It provides the mechanical strength to stand upright against wind and gravity.
C.It prevents the plant from losing any water at all.
D.It allows the plant to eat insects.
- 10.
Which of these statements about plastids is true?
A.Plastids are found in all living cells.
B.Plastids are found in animal cells for pigmentation.
C.Plastids are unique to plant cells and come in three main types.
D.Plastids are only found in animal cells for starch storage.
Download the worksheet for The Cell - Differences between Plant and Animal Cells to practice offline. It includes additional chapter-level practice questions.